DISCOVER CARD MASTER TRUST I
8-K, 1998-04-15
ASSET-BACKED SECURITIES
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<PAGE>   1
                                                                  CONFORMED COPY

                       SECURITIES AND EXCHANGE COMMISSION
                             450 Fifth Street, N.W.
                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


        Date of Report (Date of earliest event reported): April 15, 1998



                          DISCOVER CARD MASTER TRUST I
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)


Delaware                      0-23108                     Not Applicable
- ---------                     -----------                 -------------
(State of                     (Commission                 (IRS Employer
organization)                 File Number)                Identification No.)



c/o Greenwood Trust Company
12 Read's Way
New Castle, Delaware                           19720
- -------------------------------------------------------
(Address of principal executive offices)     (Zip Code)


Registrant's telephone number, including area code: (302) 323-7184



                                 Not Applicable
                 ----------------------------------------------
                 (Former address, if changed since last report)


                                  Page 1 of 128
                         Index to Exhibits is on page 7


<PAGE>   2
Item 5.  Other Events

A) Series 1993-1:
On April 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the March 1998 Due Period with respect to Series 1993-1, which is
attached as Exhibit 20(a) hereto.

B) Series 1993-2:
On April 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the March 1998 Due Period with respect to Series 1993-2, which is
attached as Exhibit 20(b) hereto.

C) Series 1993-3:
On April 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the March 1998 Due Period with respect to Series 1993-3, which is
attached as Exhibit 20(c) hereto.

D) Series 1994-2:
On April 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the March 1998 Due Period with respect to Series 1994-2, which is
attached as Exhibit 20(d) hereto.

E) Series 1994-3:
On April 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the March 1998 Due Period with respect to Series 1994-3, which is
attached as Exhibit 20(e) hereto.

F) Series 1994-A:
On April 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the March 1998 Due Period with respect to Series 1994-A, which is
attached as Exhibit 20(f) hereto.

G) Series 1995-1:
On April 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the March 1998 Due Period with respect to Series 1995-1, which is
attached as Exhibit 20(g) hereto.

H) Series 1995-2:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1995-2, which is
attached as Exhibit 20(h) hereto.

I) Series 1995-3:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1995-3, which is
attached as Exhibit 20(i) hereto.

J) Series 1996-1:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1996-1, which is
attached as Exhibit 20(j) hereto.

K) Series 1996-2:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1996-2, which is
attached as Exhibit 20(k) hereto.


                                       2


<PAGE>   3
L) Series 1996-3:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1996-3, which is
attached as Exhibit 20(l) hereto.

M) Series 1996-4:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1996-4, which is
attached as Exhibit 20(m) hereto.

N) Series 1997-1:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1997-1, which is
attached as Exhibit 20(n) hereto.

O) Series 1997-2:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1997-2, which is
attached as Exhibit 20(o) hereto.

P) Series 1997-3:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1997-3, which is
attached as Exhibit 20(p) hereto.

Q) Series 1997-4:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1997-4, which is
attached as Exhibit 20(q) hereto.

R) Series 1998-1:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1998-1, which is
attached as Exhibit 20(r) hereto.

S) Series 1998-2:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1998-2, which is
attached as Exhibit 20(s) hereto.

T) Series 1998-3:
On April 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the March 1998 Due Period with respect to Series 1998-3, which is
attached as Exhibit 20(t) hereto.


                                       3


<PAGE>   4
Item 7.  Financial Statements and Exhibits
c) Exhibits


Exhibit No.           Description
- -----------           -----------

20(a)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1993-1.

20(b)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1993-2.

20(c)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1993-3.

20(d)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1994-2.

20(e)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1994-3.

20(f)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1994-A.

20(g)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1995-1.

20(h)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1995-2.

20(i)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1995-3.

20(j)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1996-1.

20(k)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1996-2.

20(l)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1996-3.

20(m)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1996-4.

20(n)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1997-1.


                                       4


<PAGE>   5
20(o)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1997-2.

20(p)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1997-3.

20(q)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1997-4.

20(r)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1998-1.

20(s)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1998-2.

20(t)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1998-3.


                                       5


<PAGE>   6
                                   SIGNATURES

    Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                          DISCOVER CARD MASTER TRUST I
                                  (Registrant)

                           By: GREENWOOD TRUST COMPANY
                               as originator of the Trust


                                By:         John J. Coane            
                                   -------------------------------
                                   John J. Coane
                                   Vice President, Director of
                                   Accounting and Treasurer


Date: April 15, 1998


                                       6


<PAGE>   7
                                  EXHIBIT INDEX

Exhibit No.           Description
- -----------           -----------
20(a)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1993-1.

20(b)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1993-2.

20(c)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1993-3.

20(d)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1994-2.

20(e)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1994-3.

20(f)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1994-A.

20(g)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1995-1.

20(h)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1995-2.

20(i)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1995-3.

20(j)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1996-1.

20(k)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1996-2.

20(l)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1996-3.

20(m)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1996-4.

20(n)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1997-1.

20(o)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1997-2.


                                       7


<PAGE>   8
20(p)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1997-3.

20(q)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1997-4.

20(r)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1998-1.

20(s)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1998-2.

20(t)                 Monthly Certificateholders' Statement, related to the Due
                      Period ending March 31, 1998, for Series 1998-3.


                                       8




<PAGE>   1
                                                                     EXHIBIT (A)

                     MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                        Series 1993-1 Monthly Statement
                      Class A Certificate CUSIP #25466KAA7
                      Class B Certificate CUSIP #25466KAB5


Trust Distribution Date: April 15, 1998       Due Period Ending:  March 31, 1998

Pursuant to the Series Supplement dated as of October 27, 1993 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     Class Initial Investor Interest)

     Series  1993-1                                                        Total                  Interest         Principal

<S>                                                          <C>                       <C>                   <C>         
      Class A                        30 days at 5.957500000%            $4.964583333            $4.964583333       $0.000000000

      Class B                        30 days at 5.300000000%            $4.416666667            $4.416666667       $0.000000000

2.   Principal Receivables at the end of the Due Period

      (a) Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


      (b) Group One Investor Interest                                                                        $14,386,325,676.00

      (c) Group Two Investor Interest                                                                         $2,550,000,000.00

      (d) Series 1993-1 Investor Interest                                                                       $797,873,000.00

      (e) Class A Investor Interest                                                                             $750,000,000.00

          Class B Investor Interest                                                                              $47,873,000.00

3.   Allocation of Receivables Collected During the Due Period


                                                                     Finance Charge           Principal              Yield
                                                                       Collections           Collections           Collections
      (a) Allocation of Collections 
          between Investor and Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

      (b) Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

      (c) Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

      (d) Series 1993-1 Allocations                                   $13,058,293.87         $110,607,881.65              $0.00

      (e) Class A Allocations                                         $12,284,469.05         $104,053,340.52              $0.00

          Class B Allocations                                            $773,824.82           $6,554,541.13              $0.00
</TABLE>


<PAGE>   2

<TABLE>
<S>                                                          <C>                       <C>                   <C>         
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income
                                                                
     Series 1993-1                                    $0.00                    $0.00                    0.00              $0.00


5.   Information Concerning Amount of Controlled Liquidation Payments


                                                                                                                  Total Payments
                                                                       Amount Paid            Deficit Amount       Through This
                                                                    This Due Period          This Due Period         Due Period

     Series 1993-1                                                             $0.00                   $0.00              $0.00



6.   Information Concerning the Series Interest Funding Accounts ("SIFA")



                                                                                           Deposits Into the
                                                                                                 SIFAs This
                                                                                                 Due Period        SIFA Balance

          Series 1993-1                                                                        $3,934,876.58              $0.00


7.   Pool Factors                                                                                               This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

                                                                                                                 Cumulative Investor
8.   Investor Charged-Off Amount                                                      This Due Period Amount         Charged-Off

      (a) Group One                                                                           $92,397,088.58              $0.00

      (b) Group Two                                                                           $16,377,529.39              $0.00

      (c) Series 1993-1                                                                        $5,121,930.04              $0.00

      (d) Class A                                                                              $4,818,408.26              $0.00

          Class B                                                                                $303,521.78              $0.00

9.   Investor Losses This Due Period

                                                                                                                    Per $1,000 of
                                                                                                                 Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1993-1                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>


<PAGE>   3

<TABLE>
<S>                                                                                    <C>                   <C>         
10.  Reimbursement of Investor Losses This Due Period

                                                                                                                    Per $1,000 of
                                                                                                                 Original Invested
                                                                                                       Total            Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1993-1                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses       

                                                                                                                     Per $1,000 of
                                                                                                                 Original Invested
                                                                                                       Total           Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1993-1                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

      (a) Group One                                                                                              $23,977,209.44

      (b) Group Two                                                                                               $4,250,000.00

      (c) Series 1993-1                                                                                           $1,329,788.33

      (d) Class A                                                                                                 $1,250,000.00

          Class B                                                                                                    $79,788.33

13.  Class Available Subordinated Amount at the end of the Due Period

                                                                                                                  As a Percentage
                                                                                                                     of Class A
                                                                                                   Total          Invested Amount

          Series 1993-1 Class B                                                               $63,829,840.00             8.5106%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount      Class B Amount

          Maximum Amount                                                                      $19,946,825.00     $15,957,460.00

          Available Amount                                                                    $19,946,825.00     $15,957,460.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>


<PAGE>   4

<TABLE>
<S>                                                                                    <C>                 <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding       $19,619,869,946.98

                                                                                       Delinquent Amount     Percentage of Ending
          Payment Status                                                                Ending Balance     Receivables Outstanding

          30-59 days                                                                    $419,913,275.47               2.14%

          60-179 days                                                                   $911,502,585.27               4.65%
</TABLE>

                                            U.S. BANK NATIONAL ASSOCIATION
                                            as Trustee


                                          BY: ____________________________
                                                    Vice President


<PAGE>   5
                                        
                    MASTER SERVICER'S CERTIFICATE STATEMENT
                                        
                          Discover Card Master Trust I
                                        
                        Series 1993-1 Monthly Statement
                                        
                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 27, 1993 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1993-1 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:

<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related 
     Due Period is equal to                                                                                   $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed 
     during the related Due Period is equal to                                                                  $104,053,340.52

5.   The aggregate amount of Class A Finance Charge Collections processed 
     during the related Due Period is equal to                                                                   $12,284,469.05

6a.  The aggregate amount of Class A Principal Collections recharacterized 
     as Series Yield Collections during the related Due Period is equal to                                                $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution date is equal to                              $0.00

7.   The amount of drawings under the Credit Enhancement required to be 
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is equal to                                  $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders 
     on the current Distribution Date is equal to                                                                 $3,723,437.50
</TABLE>


<PAGE>   6
<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $6,554,541.13

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $773,824.82

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                                           $0.00 
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                                     $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $211,439.08

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this  15th day of April, 1998.



                                         GREENWOOD TRUST COMPANY
                                            as Master Servicer

                                         By:_________________________
                                         Vice President, Director of Accounting,
                                         and Treasurer



<PAGE>   1
                                                                      EXHIBIT(B)

                     MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                        Series 1993-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAE9
                      Class B Certificate CUSIP #25466KAF6


Trust Distribution Date: April 15, 1998       Due Period Ending:  March 31, 1998

Pursuant to the Series Supplement dated as of December 1, 1993 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                    <C>                     <C>                 <C>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)

          Series  1993-2                                                  Total                   Interest           Principal
             Class A      30 days at 5.400000000%                       $4.500000000            $4.500000000       $0.000000000

             Class B      30 days at 5.750000000%                       $4.791666667            $4.791666667       $0.000000000

2.   Principal Receivables at the end of the Due Period

      (a) Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


      (b) Group One Investor Interest                                                                        $14,386,325,676.00

      (c) Group Two Investor Interest                                                                         $2,550,000,000.00

      (d) Series 1993-2 Investor Interest                                                                       $833,334,000.00

      (e) Class A Investor Interest                                                                             $800,000,000.00

          Class B Investor Interest                                                                              $33,334,000.00

3.   Allocation of Receivables Collected During the Due Period

                                                                      Finance Charge            Principal              Yield
                                                                        Collections            Collections          Collections

      (a) Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

      (b) Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

      (c) Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

      (d) Series 1993-2 Allocations                                   $13,638,662.48         $115,523,787.50              $0.00

      (e) Class A Allocations                                         $13,090,536.57         $110,880,987.53              $0.00

          Class B Allocations                                            $548,125.91           $4,642,799.97              $0.00
</TABLE>


<PAGE>   2
<TABLE>
<S>                                                                  <C>                 <C>                    <C>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")

                                               Deposits into the
                                                   SPFAs This                  SPFA             Deposit Deficit       Investment
                                                   Due Period                 Balance                  Amount            Income

          Series 1993-2                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of Controlled Liquidation Payments

                                                                                                                    Total Payments
                                                                         Amount Paid              Deficit Amount     Through This
                                                                       This Due Period           This Due Period      Due Period

          Series 1993-2                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")

                                                                                            Deposits Into the
                                                                                                SIFAs This
                                                                                                Due Period            SIFA Balance

          Series 1993-2                                                                        $3,759,725.42              $0.00

7.   Pool Factors
                                                                                                                  This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount
                                                                                                                       Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period              Amount

      (a) Group One                                                                           $92,397,088.58              $0.00

      (b) Group Two                                                                           $16,377,529.39              $0.00

      (c) Series 1993-2                                                                        $5,349,571.37              $0.00

      (d) Class A                                                                              $5,134,576.78              $0.00

          Class B                                                                                $214,994.59              $0.00

9.   Investor Losses This Due Period
                                                                                                                   Per $1,000 of
                                                                                                                 Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1993-2                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>


<PAGE>   3
<TABLE>
<S>                                                                  <C>                 <C>                 <C>
10.  Reimbursement of Investor Losses This Due Period                                                             Per $1,000 of
                                                                                                               Original Invested
                                                                                                      Total        Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1993-2                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses                                                                Per $1,000 of
                                                                                                                  Original Invested
                                                                                                       Total           Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1993-2                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

      (a) Group One                                                                                              $23,977,209.44

      (b) Group Two                                                                                               $4,250,000.00

      (c) Series 1993-2                                                                                           $1,388,890.00

      (d) Class A                                                                                                 $1,333,333.33

          Class B                                                                                                    $55,556.67

13.  Class Available Subordinated Amount at the end of the Due Period
                                                                                                                    As a Percentage
                                                                                                                      of Class A
                                                                                                  Total             Invested Amount

          Series 1993-2 Class B                                                               $50,000,040.00             6.2500%

14.  Total Available Credit Enhancement Amounts

                                                                                              Shared Amount       Class B Amount

          Maximum Amount                                                                      $20,833,350.00      $8,333,340.00

          Available Amount                                                                    $20,833,350.00      $8,333,340.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>


<PAGE>   4
<TABLE>
<S>                                                                  <C>                 <C>                 <C>
15.  Delinquency Summary

          End of Due Period Master Trust Receivables Outstanding                                             $19,619,869,946.98

                                                                                           Delinquent Amount    Percentage of Ending
          Payment Status                                                                     Ending Balance  Receivables Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                                       U.S. BANK NATIONAL ASSOCIATION
                                       as Trustee


                                       BY: ____________________________
                                                Vice President








<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1993-2 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of December 1, 1993 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1993-2 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $110,880,987.53

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $13,090,536.57

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall
         is equal to                                                                                                      $0.00 

     (b)  with respect to the Class A Cumulative Investor Charged-Off
          Amount is equal to                                                                                              $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $3,600,000.00
</TABLE>


<PAGE>   6

<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $4,642,799.97

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $548,125.91

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is equal to                                  $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $159,725.42

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                 as Master Servicer

                               By:_________________________
                               Vice President, Director of Accounting,
                               and Treasurer




<PAGE>   1
                                                                     EXHIBIT (C)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1993-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAC3
                      Class B Certificate CUSIP #25466KAD1


Trust Distribution Date: April 15, 1998      Due Period Ending:  March 31, 1998

Pursuant to the Series Supplement dated as of November 23, 1993 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                               <C>                   <C>                  <C>
1.   Payments for the benefit of Series Investors this Due 
     Period (per $1000 of Class Initial Investor Interest)

          Series  1993-3                                                       Total                Interest          Principal
             Class A      30 days at 6.200000000%                       $5.166666667            $5.166666667       $0.000000000

             Class B      30 days at 6.450000000%                       $5.375000000            $5.375000000       $0.000000000

2.   Principal Receivables at the end of the Due Period

      (a) Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


      (b) Group One Investor Interest                                                                        $14,386,325,676.00

      (c) Group Two Investor Interest                                                                         $2,550,000,000.00

      (d) Series 1993-3 Investor Interest                                                                       $366,493,000.00

      (e) Class A Investor Interest                                                                             $350,000,000.00

          Class B Investor Interest                                                                              $16,493,000.00

3.   Allocation of Receivables Collected During the Due 
     Period

                                                                      Finance Charge               Principal             Yield
                                                                         Collections             Collections        Collections

      (a) Allocation of Collections between Investor and 
          Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

      (b) Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

      (c) Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

      (d) Series 1993-3 Allocations                                    $5,997,142.37          $50,797,693.79              $0.00

      (e) Class A Allocations                                          $5,739,200.76          $48,612,846.75              $0.00

          Class B Allocations                                            $257,941.61           $2,184,847.04              $0.00
</TABLE>

<PAGE>   2

<TABLE>
<S>                                              <C>            <C>                       <C>                <C>
4.   Information Concerning the Series 
     Principal Funding Accounts ("SPFA")

                                                   Deposits
                                                   into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1993-3                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of 
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1993-3                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series 
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1993-3                                                                        $1,896,983.21      $9,484,916.05

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                               Investor Charged-Off
                                                                                             This Due Period             Amount

      (a) Group One                                                                           $92,397,088.58              $0.00

      (b) Group Two                                                                           $16,377,529.39              $0.00

      (c) Series 1993-3                                                                        $2,352,293.80              $0.00

      (d) Class A                                                                              $2,251,119.87              $0.00

          Class B                                                                                 $101,173.93             $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1993-3                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>

<PAGE>   3

<TABLE>
<S>                                                                                 <C>                      <C>
10.  Reimbursement of Investor Losses This 
     Due Period                                                               
                                                                                                                    Per $1,000 of
                                                                                                    Original           Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1993-3                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor 
     Losses 
                                                                                                                     Per $1,000 of
                                                                                                                  Original Invested
                                                                                                       Total           Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1993-3                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable 
     at the end of the Due Period

      (a) Group One                                                                                              $23,977,209.44

      (b) Group Two                                                                                               $4,250,000.00

      (c) Series 1993-3                                                                                             $610,821.66

      (d) Class A                                                                                                   $583,333.33

          Class B                                                                                                    $27,488.33

13.  Class Available Subordinated Amount at the 
     end of the Due Period

                                                                                                                   As a Percentage
                                                                                                                     of Class A
                                                                                                       Total       Invested Amount

          Series 1993-3 Class B                                                               $23,822,045.00             6.8063%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                       $9,162,325.00      $5,497,395.00

          Available Amount                                                                     $9,162,325.00      $5,497,395.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>


<PAGE>   4
<TABLE>
<S>                                                                                 <C>                      <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                  Percentage of
                                                                                                  Delinquent             Ending
                                                                                                      Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                         U.S. BANK NATIONAL ASSOCIATION
                             as Trustee


                         BY: ____________________________
                         Vice President


<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1993-3 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of November 23, 1993 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1993-3 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:

<TABLE>
<S>                                                                                                         <C>
     1.   Greenwood is Master Servicer under the Pooling and Servicing
          Agreement.

     2.   The undersigned is a Servicing Officer of Greenwood as Master
          Servicer.

     3.   The aggregate amount of Collections processed during the related Due
          Period is equal to                                                                                  $3,053,485,815.26

     4.   The aggregate amount of Class A Principal Collections processed during
          the related Due Period is equal to                                                                     $48,612,846.75

     5.   The aggregate amount of Class A Finance Charge Collections processed
          during the related Due Period is equal to                                                               $5,739,200.76

     6a.  The aggregate amount of Class A Principal Collections
          recharacterized as Series Yield Collections during the related Due
          Period is equal to                                                                                              $0.00

     6b.  The aggregate amount of Class A Additional Funds for this
          Distribution date is equal to                                                                                   $0.00

     7.   The amount of drawings under the Credit Enhancement required to be
          made on the related Drawing Date pursuant to the Series Supplement:

          (a)  with respect to the Class A Required Amount Shortfall is equal to                                          $0.00

          (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is equal to                             $0.00

          (c)  with respect to the Class A Investor Interest is equal to                                                  $0.00

     8.   The sum of all amounts payable to the Class A Certificateholders on
          the current Distribution Date is equal to                                                                       $0.00
</TABLE>

<PAGE>   6

<TABLE>
<S>                                                                                                         <C>
     9.   The aggregate amount of Class B Principal Collections processed during
          the related Due Period is equal to                                                                      $2,184,847.04

     10.  The aggregate amount of Class B Finance Charge Collections processed
          during the related Due Period is equal to                                                                 $257,941.61

     11a. The aggregate amount of Class B Principal Collections recharacterized
          as Series Yield Collections during the related Due Period is equal
          to                                                                                                              $0.00

     11b. The aggregate amount of Class B Additional Funds for this Distribution
          date is equal to                                                                                                $0.00

     12.  The amount of drawings under the Credit Enhancement required to be
          made on the related Drawing Date pursuant to the Series Supplement:

          (a)  with respect to the Class B Required Amount Shortfall is equal to                                          $0.00 

          (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is equal to                             $0.00

          (c)  with respect to the Class B Investor Interest is equal to                                                  $0.00

     13.  The sum of all amounts payable to the Class B Certificateholders on
          the current Distribution Date is equal to                                                                       $0.00

     14.  Attached hereto is a true copy of the statement required to be
          delivered by the Master Servicer on the date of this Certificate to
          the Trustee pursuant to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this  15th day of April, 1998.



                                         GREENWOOD TRUST COMPANY
                                             as Master Servicer

                                         By:_________________________
                                         Vice President, Director of Accounting,
                                         and Treasurer







<PAGE>   1
                                                                     EXHIBIT (D)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1994-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAJ8
                      Class B Certificate CUSIP #25466KAK5


Trust Distribution Date: April 15, 1998 Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of October 14, 1994 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                        <C>                       <C>                     <C>
1.   Payments for the benefit of Series Investors this 
     Due Period (per $1000 of Class Initial 
     Investor Interest)

          Series  1994-2                                                       Total                Interest          Principal
             Class A      30 days at 6.037500000%                       $5.031250000            $5.031250000       $0.000000000

             Class B      30 days at 8.050000000%                       $6.708333333            $6.708333333       $0.000000000

2.   Principal Receivables at the end of the Due Period

      (a) Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


      (b) Group One Investor Interest                                                                        $14,386,325,676.00

      (c) Group Two Investor Interest                                                                         $2,550,000,000.00

      (d) Series 1994-2 Investor Interest                                                                       $894,737,000.00

      (e) Class A Investor Interest                                                                             $850,000,000.00

          Class B Investor Interest                                                                              $44,737,000.00

3.   Allocation of Receivables Collected During the 
     Due Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

      (a) Allocation of Collections between 
          Investor and Seller

          Aggregate Investor Allocation                               $277,319,470.48      $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

      (b) Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

      (c) Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

      (d) Series 1994-2 Allocations                                   $14,670,428.91         $124,263,175.68              $0.00

      (e) Class A Allocations                                         $13,928,846.79         $117,981,740.43              $0.00

          Class B Allocations                                             $741,582.12          $6,281,435.25              $0.00
</TABLE>


<PAGE>   2
<TABLE>
<CAPTION>
<S>                                         <C>                   <C>                   <C>                   <C>
4.   Information Concerning the Series 
     Principal Funding Accounts ("SPFA")

                                            Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1994-2                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of 
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1994-2                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series 
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period      SIFA Balance

          Series 1994-2                                                                        $4,576,673.21              $0.00

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                       Investor
                                                                                                                    Charged-Off
                                                                                             This Due Period             Amount

      (a) Group One                                                                           $92,397,088.58              $0.00

      (b) Group Two                                                                           $16,377,529.39              $0.00

      (c) Series 1994-2                                                                        $5,754,267.08              $0.00

      (d) Class A                                                                              $5,463,392.04              $0.00

          Class B                                                                                $290,875.04              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1994-2                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>


<PAGE>   3
<TABLE>
<S>                                                                                 <C>                      <C>
10.  Reimbursement of Investor Losses This Due Period                                                             Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1994-2                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses                                                             Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1994-2                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

      (a) Group One                                                                                              $23,977,209.44

      (b) Group Two                                                                                               $4,250,000.00

      (c) Series 1994-2                                                                                           $1,491,228.34

      (d) Class A                                                                                                 $1,416,666.67

          Class B                                                                                                    $74,561.67

13.  Class Available Subordinated Amount at the end of the Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1994-2 Class B                                                               $89,473,700.00            10.5263%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $44,736,850.00

          Available Amount                                                                             $0.00     $44,736,850.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>


<PAGE>   4
<TABLE>
<S>                                                                                  <C>                     <C>
15.  Delinquency Summary

          End of Due Period Master Trust Receivables Outstanding                                             $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                      Amount          of Ending
                                                                                                  Delinquent        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                   as Trustee


                                 BY: ____________________________
                                         Vice President


<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1994-2 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 14, 1994 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1994-2 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $117,981,740.43

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $13,928,846.79

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is equal to                                  $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $4,276,562.50
</TABLE>


<PAGE>   6
<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $6,281,435.25

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $741,582.12

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is equal to                                  $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $300,110.71

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>


     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.


                      GREENWOOD TRUST COMPANY
                        as Master Servicer

                      By:_________________________
                        Vice President, Director of Accounting,
                        and Treasurer



<PAGE>   1
                                                                     EXHIBIT (E)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1994-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAL3
                      Class B Certificate CUSIP #25466KAM1


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of October 20, 1994 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                        <C>                       <C>                     <C>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     Class Initial Investor Interest)

          Series  1994-3                                                       Total                Interest          Principal
             Class A      30 days at 5.877500000%                       $4.897916667            $4.897916667       $0.000000000

             Class B      30 days at 7.750000000%                       $6.458333333            $6.458333333       $0.000000000

2.   Principal Receivables at the end of the Due Period

      (a) Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


      (b) Group One Investor Interest                                                                        $14,386,325,676.00

      (c) Group Two Investor Interest                                                                         $2,550,000,000.00

      (d) Series 1994-3 Investor Interest                                                                       $789,474,000.00

      (e) Class A Investor Interest                                                                             $750,000,000.00

          Class B Investor Interest                                                                              $39,474,000.00

3.   Allocation of Receivables Collected During 
     the Due Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

      (a) Allocation of Collections between 
          Investor and Seller

          Aggregate Investor Allocation                               $277,319,470.48      $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

      (b) Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

      (c) Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

      (d) Series 1994-3 Allocations                                   $12,929,323.07         $109,515,458.13              $0.00

      (e) Class A Allocations                                         $12,284,469.05         $104,053,340.52              $0.00

          Class B Allocations                                            $644,854.02           $5,462,117.61              $0.00
</TABLE>


<PAGE>   2


<TABLE>
<S>                                              <C>              <C>                   <C>                   <C>
4.   Information Concerning the Series Principal 
     Funding Accounts ("SPFA")

                                                   Deposits 
                                                   into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1994-3                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of 
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1994-3                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series 
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1994-3                                                                        $3,928,373.75              $0.00

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                       Investor
                                                                                                                    Charged-Off
                                                                                             This Due Period             Amount

      (a) Group One                                                                           $92,397,088.58              $0.00

      (b) Group Two                                                                           $16,377,529.39              $0.00

      (c) Series 1994-3                                                                        $5,071,343.08              $0.00

      (d) Class A                                                                              $4,818,408.26              $0.00

          Class B                                                                                $252,934.82              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1994-3                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>


<PAGE>   3

<TABLE>
<S>                                                                                 <C>                      <C>
     
10.  Reimbursement of Investor Losses This 
     Due Period 
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1994-3                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses 
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1994-3                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

      (a) Group One                                                                                              $23,977,209.44

      (b) Group Two                                                                                               $4,250,000.00

      (c) Series 1994-3                                                                                           $1,315,790.00

      (d) Class A                                                                                                 $1,250,000.00

          Class B                                                                                                    $65,790.00

13.  Class Available Subordinated Amount at the end of the Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1994-3 Class B                                                               $83,131,612.20            11.0842%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $39,473,700.00

          Available Amount                                                                             $0.00     $39,473,700.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>


<PAGE>   4

<TABLE>
<S>                                                                                  <C>                     <C>
15.  Delinquency Summary

          End of Due Period Master Trust Receivables Outstanding                                             $19,619,869,946.98

                                                                                                                  Percentage of 
                                                                                                                         Ending
                                                                                           Delinquent Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                           U.S. BANK NATIONAL ASSOCIATION
                              as Trustee


                           BY: ____________________________
                                    Vice President


<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1994-3 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 20, 1994 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1994-3 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $104,053,340.52

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $12,284,469.05

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00 

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is equal to                                  $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $3,673,437.50
</TABLE>

<PAGE>   6

<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $5,462,117.61

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $644,854.02

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is equal to                                  $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $254,936.25

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.


                      GREENWOOD TRUST COMPANY
                         as Master Servicer

                      By:_________________________
                      Vice President, Director of Accounting,
                      and Treasurer



<PAGE>   1
                                                                     EXHIBIT (F)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1994-A Monthly Statement


Trust Distribution Date: April 15, 1998       Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of December 20, 1994 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                 <C>              <C>                     <C>

1.   Payments for the benefit of Series Investors this 
     Due Period (per $1000 of Class Initial Investor Interest)

     Series  1994-A                                                            Total                Interest          Principal
       Class A      30 days at 5.968963500%                             $4.974136250            $4.974136250       $0.000000000

2.   Principal Receivables at the end of the Due Period

      (a) Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


      (b) Group One Investor Interest                                                                        $14,386,325,676.00

      (c) Group Two Investor Interest                                                                         $2,550,000,000.00

      (d) Series 1994-A Investor Interest                                                                     $2,550,000,000.00

      (e) Class A Investor Interest                                                                           $2,550,000,000.00

          Class B Investor Interest                                                                                       $0.00

3.   Allocation of Receivables Collected During the Due Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

      (a) Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

      (b) Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

      (c) Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

      (d) Series 1994-A Allocations                                   $41,754,297.66         $353,672,115.41              $0.00

      (e) Class A Allocations                                         $41,754,297.66         $353,672,115.41              $0.00

          Class B Allocations                                                  $0.00                   $0.00              $0.00
</TABLE>


<PAGE>   2
<TABLE>
<S>                                              <C>                <C>               <C>                    <C>

4.   Information Concerning the Series 
     Principal Funding Accounts ("SPFA")
                 Deposits into the SPFAs

                                                  This Due                    Total         Deposit Deficit         Investment
                                                     Period                 Deposits                  Amount             Income

          Series 1994-A                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of 
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1994-A                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series 
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1994-A                                                                       $12,684,047.44              $0.00

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    0.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                       Investor
                                                                                                                    Charged-Off
                                                                                             This Due Period             Amount

      (a) Group One                                                                           $92,397,088.58              $0.00

      (b) Group Two                                                                           $16,377,529.39              $0.00

      (c) Series 1994-A                                                                       $16,377,529.39              $0.00

      (d) Class A                                                                             $16,377,529.39              $0.00

          Class B                                                                                      $0.00              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1994-A                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>


<PAGE>   3

<TABLE>
<S>                                                                                  <C>                     <C>
10.  Reimbursement of Investor Losses This Due Period 
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1994-A                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses 
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1994-A                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

      (a) Group One                                                                                              $23,977,209.44

      (b) Group Two                                                                                               $4,250,000.00

      (c) Series 1994-A                                                                                           $4,250,000.00

      (d) Class A                                                                                                 $4,250,000.00

          Class B                                                                                                         $0.00

13.  Class Available Subordinated Amount at the end of the Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1994-A Class B                                                                        $0.00             0.0000%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                     $204,000,000.00              $0.00

          Available Amount                                                                   $204,000,000.00              $0.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>


<PAGE>   4
<TABLE>
<S>                                                                                 <C>                      <C>

15.  Delinquency Summary

          End of Due Period Master Trust Receivables Outstanding                                             $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                  Delinquent          of Ending
                                                                                                      Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                          U.S. BANK NATIONAL ASSOCIATION
                            as Trustee


                          BY: ____________________________
                                   Vice President


<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1994-A Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of December 20, 1994 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1994-A Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:

<TABLE>
<S>                                                                                                         <C>

1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $353,672,115.41

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $41,754,297.66

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution Date
     is equal to                                                                                                          $0.00

7.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                       $12,684,047.44

8.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00 

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is equal to                                  $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00
</TABLE>


<PAGE>   6
<TABLE>
<S>                                                                                  <C>
9.   Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                      GREENWOOD TRUST COMPANY
                        as Master Servicer

                      By:_________________________
                      Vice President, Director of Accounting,
                      and Treasurer



<PAGE>   1
                                                                     EXHIBIT (G)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1995-1 Monthly Statement
                      Class A Certificate CUSIP #25466KAN9
                      Class B Certificate CUSIP #25466KAP4


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of April 19, 1995 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                  <C>             <C>                     <C>

1.   Payments for the benefit of Series Investors 
     this Due Period (per $1000 of Class Initial 
     Investor Interest)

          Series  1995-1                                                       Total                Interest          Principal
             Class A      30 days at 5.967500000%                       $4.972916667            $4.972916667       $0.000000000

             Class B      30 days at 6.137500000%                       $5.114583333            $5.114583333       $0.000000000

2.   Principal Receivables at the end of the Due Period

      (a) Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


      (b) Group One Investor Interest                                                                        $14,386,325,676.00

      (c) Group Two Investor Interest                                                                         $2,550,000,000.00

      (d) Series 1995-1 Investor Interest                                                                       $631,579,000.00

      (e) Class A Investor Interest                                                                             $600,000,000.00

          Class B Investor Interest                                                                              $31,579,000.00

3.   Allocation of Receivables Collected 
     During the Due Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

      (a) Allocation of Collections between 
          Investor and Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

      (b) Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

      (c) Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

      (d) Series 1995-1 Allocations                                   $10,349,906.99          $87,666,987.68              $0.00

      (e) Class A Allocations                                          $9,834,023.78          $83,297,293.59              $0.00

          Class B Allocations                                            $515,883.21           $4,369,694.09              $0.00
</TABLE>


<PAGE>   2
<TABLE>
<S>                                       <C>                  <C>                    <C>                    <C>

4.   Information Concerning the Series 
     Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1995-1                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of 
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1995-1                                                        $0.00                   $0.00               $0.00

6.   Information Concerning the Series
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1995-1                                                                        $3,145,263.43              $0.00

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                       Investor
                                                                                                                    Charged-Off
                                                                                             This Due Period             Amount

      (a) Group One                                                                           $92,397,088.58              $0.00

      (b) Group Two                                                                           $16,377,529.39              $0.00

      (c) Series 1995-1                                                                        $4,059,603.81              $0.00

      (d) Class A                                                                              $3,857,255.96              $0.00

          Class B                                                                                $202,347.85              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                                       Original
                                                                                                                       Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1995-1                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>


<PAGE>   3
<TABLE>
<S>                                                                                  <C>                     <C>
10.  Reimbursement of Investor Losses This Due Period 
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1995-1                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses 
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

      (a) Group One                                                                                    $0.00              $0.00

      (b) Group Two                                                                                    $0.00              $0.00

      (c) Series 1995-1                                                                                $0.00              $0.00

      (d) Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

      (a) Group One                                                                                              $23,977,209.44

      (b) Group Two                                                                                               $4,250,000.00

      (c) Series 1995-1                                                                                           $1,052,631.67

      (d) Class A                                                                                                 $1,000,000.00

          Class B                                                                                                    $52,631.67

13.  Class Available Subordinated Amount at the end of the Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1995-1 Class B                                                               $69,473,690.00            11.5789%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $37,894,740.00

          Available Amount                                                                             $0.00     $37,894,740.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>


<PAGE>   4
<TABLE>
<S>                                                                                 <C>                      <C>

15.  Delinquency Summary

          End of Due Period Master Trust Receivables Outstanding                                             $19,619,869,946.98

                                                                                                                  Percentage of 
                                                                                                                         Ending
                                                                                           Delinquent Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                      U.S. BANK NATIONAL ASSOCIATION
                        as Trustee


                      BY: ____________________________
                               Vice President

<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1995-1 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of April 19, 1995 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1995-1 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                              $83,297,293.59

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                           $9,834,023.78

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall
          is equal to                                                                                                     $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off
          Amount is equal to                                                                                              $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $2,983,750.00
</TABLE>




<PAGE>   6


<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $4,369,694.09

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $515,883.21

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall
          is equal to                                                                                                     $0.00

     (b) with respect to the Class B Cumulative Investor Charged-Off Amount
         is equal to                                                                                                      $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $161,513.43

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

          IN WITNESS WHEREOF, the undersigned has duly executed and delivered
     certificate this  15th day of April, 1998.


                                     GREENWOOD TRUST COMPANY
                                         as Master Servicer

                                     By:_________________________
                                     Vice President, Director of Accounting,
                                     and Treasurer




<PAGE>   1
                                                                     EXHIBIT (H)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1995-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAQ2
                      Class B Certificate CUSIP #25466KAR0


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of August 1, 1995 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                  <C>                   <C>              <C>
1.   Payments for the benefit of Series Investors this Due
     Period (per $1000 of Class Initial Investor Interest)

     Series  1995-2                                                            Total                Interest          Principal
        Class A      30 days at 6.550000000%                            $5.458333333            $5.458333333       $0.000000000

        Class B      30 days at 6.750000000%                            $5.625000000            $5.625000000       $0.000000000

     2.   Principal Receivables at the end of the Due Period

          (a)  Aggregate Investor Interest                                                                   $16,936,325,676.00
               Seller Interest                                                                                $2,389,177,999.72

               Total Master Trust                                                                            $19,325,503,675.72


          (b)  Group One Investor Interest                                                                   $14,386,325,676.00

          (c)  Group Two Investor Interest                                                                    $2,550,000,000.00

          (d)  Series 1995-2 Investor Interest                                                                  $526,316,000.00

          (e)  Class A Investor Interest                                                                        $500,000,000.00

               Class B Investor Interest                                                                         $26,316,000.00

     3.   Allocation of Receivables Collected During the Due Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

          (a)  Allocation of Collections between Investor and Seller

               Aggregate Investor Allocation                         $277,319,470.48       $2,348,983,679.25              $0.00

               Seller                                                 $45,107,538.56         $382,075,126.99              $0.00

          (b)  Group One Allocation                                  $235,565,172.82       $1,995,311,563.84              $0.00

          (c)  Group Two Allocation                                   $41,754,297.66         $353,672,115.41              $0.00

          (d)  Series 1995-2 Allocations                               $8,608,801.14          $72,919,270.13              $0.00

          (e)  Class A Allocations                                     $8,189,646.03          $69,368,893.68              $0.00

               Class B Allocations                                       $419,155.11           $3,550,376.45              $0.00
</TABLE>



<PAGE>   2


<TABLE>
<S>                                           <C>               <C>                      <C>                    <C>
4.   Information Concerning the Series
     Principal Funding Accounts ("SPFA")

                                                   Deposits
                                                   into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1995-2                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of
     Controlled Liquidation Payments

                                                                                              Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1995-2                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1995-2                                                                        $2,877,194.17      $5,754,388.34

7.   Pool Factors
                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount
                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1995-2                                                                        $3,376,679.80              $0.00

     (d)  Class A                                                                              $3,212,272.17              $0.00

          Class B                                                                                $164,407.63              $0.00

9.   Investor Losses This Due Period
                                                                                                                  Per $1,000 of
                                                                                                    Original           Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1995-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>



<PAGE>   3

<TABLE>
<S>                                                                                 <C>                     <C>
10.  Reimbursement of Investor Losses This Due Period
                                                                                                                  Per $1,000 of
                                                                                                    Original           Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1995-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses
                                                                                                                  Per $1,000 of
                                                                                                    Original           Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1995-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of
     the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1995-2                                                                                             $877,193.33

     (d)  Class A                                                                                                   $833,333.33

          Class B                                                                                                    $43,860.00

13.  Class Available Subordinated Amount at the end of the
     Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1995-2 Class B                                                               $34,210,540.00             6.8421%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $15,789,480.00

          Available Amount                                                                             $0.00     $15,789,480.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>



<PAGE>   4


<TABLE>
<S>                                                                                 <C>                     <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                  Percentage of
                                                                                                  Delinquent             Ending
                                                                                                      Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President



<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1995-2 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of August 1, 1995 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1995-2 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing
     Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master
     Servicer.

3.   The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                                       $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                                          $69,368,893.68

5.   The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                                    $8,189,646.03

6a.  The aggregate amount of Class A Principal Collections
     recharacterized as Series Yield Collections during the related Due
     Period is equal to                                                                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this
     Distribution date is equal to                                                                                        $0.00

7.   The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                                $0.00
</TABLE>



<PAGE>   6


<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $3,550,376.45

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $419,155.11

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                                $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                                    GREENWOOD TRUST COMPANY
                                         as Master Servicer

                                    By:____________________________________
                                    Vice President, Director of Accounting,
                                    and Treasurer




<PAGE>   1
                                                                     EXHIBIT (I)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1995-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAS8
                      Class B Certificate CUSIP #25466KAT6


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of September 28, 1995 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                             <C>                 <C>                     <C>
1.   Payments for the benefit of Series Investors this Due
     Period (per $1000 of Class Initial Investor Interest)

          Series  1995-3                                                       Total                Interest          Principal
             Class A      30 days at 5.897500000%                       $4.914583333            $4.914583333       $0.000000000

             Class B      30 days at 6.017500000%                       $5.014583333            $5.014583333       $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


     (b)  Group One Investor Interest                                                                        $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                         $2,550,000,000.00

     (d)  Series 1995-3 Investor Interest                                                                       $526,316,000.00

     (e)  Class A Investor Interest                                                                             $500,000,000.00

          Class B Investor Interest                                                                              $26,316,000.00

3.   Allocation of Receivables Collected During the Due
     Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

     (a)  Allocation of Collections between Investor and
          Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

     (d)  Series 1995-3 Allocations                                    $8,608,801.14          $72,919,270.13              $0.00

     (e)  Class A Allocations                                          $8,189,646.03          $69,368,893.68              $0.00

          Class B Allocations                                            $419,155.11           $3,550,376.45              $0.00
</TABLE>



<PAGE>   2


<TABLE>
<S>                                          <C>           <C>                      <C>                     <C>
4.   Information Concerning the Series
     Principal Funding Accounts ("SPFA")

                                                   Deposits
                                                   into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1995-3                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1995-3                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1995-3                                                                        $2,589,255.45              $0.00

7.   Pool Factors
                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount
                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1995-3                                                                        $3,376,679.80              $0.00

     (d)  Class A                                                                              $3,212,272.17              $0.00

          Class B                                                                                $164,407.63              $0.00

9.   Investor Losses This Due Period
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1995-3                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

</TABLE>



<PAGE>   3



<TABLE>
<S>                                                                                 <C>                     <C>
     10.  Reimbursement of Investor Losses This Due Period
                                                                                                                  Per $1,000 of
                                                                                                    Original           Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1995-3                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses
                                                                                                                  Per $1,000 of
                                                                                                    Original           Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1995-3                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of
     the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1995-3                                                                                             $877,193.33

     (d)  Class A                                                                                                   $833,333.33

          Class B                                                                                                    $43,860.00

13.  Class Available Subordinated Amount at the end of the
     Due Period
                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1995-3 Class B                                                               $57,894,760.00            11.5790%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $31,578,960.00

          Available Amount                                                                             $0.00     $31,578,960.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>



<PAGE>   4

<TABLE>
<S>                                                                                 <C>                     <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                  Percentage of
                                                                                                                         Ending
                                                                                           Delinquent Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47              2.14%

          60-179 days                                                                        $911,502,585.27              4.65%
</TABLE>


                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President



<PAGE>   5


                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1995-3 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of September 28, 1995 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1995-3 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>

1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                              $69,368,893.68

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                           $8,189,646.03

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $2,457,291.67
</TABLE>



<PAGE>   6


<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $3,550,376.45

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $419,155.11

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $131,963.78

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                    as Master Servicer

                               By:____________________________________
                               Vice President, Director of Accounting,
                               and Treasurer




<PAGE>   1
                                                                     EXHIBIT (J)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1996-1 Monthly Statement
                      Class A Certificate CUSIP #25466KAU3
                      Class B Certificate CUSIP #25466KAV1


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of January 18, 1996 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                               <C>               <C>                     <C>
1.   Payments for the benefit of Series Investors this Due
     Period (per $1000 of Class Initial Investor Interest)

          Series  1996-1                                                       Total                Interest          Principal
             Class A      30 days at 5.857500000%                       $4.881250000            $4.881250000       $0.000000000

             Class B      30 days at 5.987500000%                       $4.989583333            $4.989583333       $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                        $16,936,325,676.00

          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


     (b)  Group One Investor Interest                                                                        $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                         $2,550,000,000.00

     (d)  Series 1996-1 Investor Interest                                                                     $1,052,632,000.00

     (e)  Class A Investor Interest                                                                           $1,000,000,000.00

          Class B Investor Interest                                                                              $52,632,000.00

3.   Allocation of Receivables Collected During the Due Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

     (a)  Allocation of Collections between Investor and
          Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

     (d)  Series 1996-1 Allocations                                   $17,249,844.98         $146,111,646.14              $0.00

     (e)  Class A Allocations                                         $16,379,292.06         $138,737,787.36              $0.00

          Class B Allocations                                            $870,552.92           $7,373,858.78              $0.00
</TABLE>



<PAGE>   2

<TABLE>
<S>                                         <C>                   <C>                 <C>                      <C>
4.   Information Concerning the Series
     Principal Funding Accounts ("SPFA")

                                                   Deposits
                                                   into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1996-1                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of Controlled
     Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1996-1                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series Interest Funding
     Accounts ("SIFA")
                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1996-1                                                                        $5,143,861.75              $0.00

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1996-1                                                                        $6,766,006.35              $0.00

     (d)  Class A                                                                              $6,424,544.35              $0.00

          Class B                                                                                $341,462.00              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1996-1                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>



<PAGE>   3


<TABLE>
<S>                                                                                 <C>                     <C>
10.  Reimbursement of Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1996-1                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1996-1                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the
     end of the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1996-1                                                                                           $1,754,386.67

     (d)  Class A                                                                                                 $1,666,666.67

          Class B                                                                                                    $87,720.00

13.  Class Available Subordinated Amount at the end of
     the Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1996-1 Class B                                                              $105,263,200.00            10.5263%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $57,894,760.00

          Available Amount                                                                             $0.00     $57,894,760.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>




<PAGE>   4


<TABLE>
<S>                                                                                 <C>                     <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                  Delinquent          of Ending
                                                                                                      Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President



<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1996-1 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of January 18, 1996 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-1 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $138,737,787.36

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $16,379,292.06

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

     8.   The sum of all amounts payable to the Class A Certificateholders on
          the current Distribution Date is equal to                                                               $4,881,250.00
</TABLE>



<PAGE>   6

<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $7,373,858.78

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $870,552.92

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $262,611.75

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                    as Master Servicer

                               By:____________________________________
                               Vice President, Director of Accounting,
                               and Treasurer




<PAGE>   1
                                                                     EXHIBIT (K)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1996-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAW9
                      Class B Certificate CUSIP #25466KAX7


Trust Distribution Date: April 15, 1998       Due Period Ending:  March 31, 1998

Pursuant to the Series Supplement dated as of January 29, 1996 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                  <C>            <C>                     <C>
1.   Payments for the benefit of Series Investors this Due
     Period (per $1000 of Class Initial Investor Interest)

          Series  1996-2                                                       Total                Interest          Principal
             Class A      30 days at 5.907500000%                       $4.922916667            $4.922916667       $0.000000000

             Class B      30 days at 6.047500000%                       $5.039583333            $5.039583333       $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72

     (b)  Group One Investor Interest                                                                        $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                         $2,550,000,000.00

     (d)  Series 1996-2 Investor Interest                                                                       $947,369,000.00

     (e)  Class A Investor Interest                                                                             $900,000,000.00

          Class B Investor Interest                                                                              $47,369,000.00

3.   Allocation of Receivables Collected During the Due
     Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

     (a)  Allocation of Collections between Investor
          and Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

     (d)  Series 1996-2 Allocations                                   $15,508,739.14         $131,363,928.57              $0.00

     (e)  Class A Allocations                                         $14,734,914.32         $124,809,387.44              $0.00

          Class B Allocations                                            $773,824.82           $6,554,541.13              $0.00
</TABLE>



<PAGE>   2

<TABLE>
<S>                                       <C>                    <C>                <C>                     <C>
4.   Information Concerning the Series
     Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1996-2                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1996-2                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1996-2                                                                        $4,669,345.02              $0.00

7.   Pool Factors
                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount
                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1996-2                                                                        $6,083,082.35              $0.00

     (d)  Class A                                                                              $5,779,560.57              $0.00

          Class B                                                                                $303,521.78              $0.00

9.   Investor Losses This Due Period
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1996-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>



<PAGE>   3


<TABLE>
<S>                                                                                 <C>                     <C>
10.  Reimbursement of Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1996-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1996-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end
     of the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1996-2                                                                                           $1,578,948.33

     (d)  Class A                                                                                                 $1,500,000.00

          Class B                                                                                                    $78,948.33

13.  Class Available Subordinated Amount at the end of
     the Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1996-2 Class B                                                              $104,210,590.00            11.5790%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

     Maximum Amount                                                                                    $0.00     $56,842,140.00

     Available Amount                                                                                  $0.00     $56,842,140.00

     Amount of Drawings on Credit Enhancement
      for this Due Period                                                                              $0.00              $0.00
</TABLE>




<PAGE>   4


<TABLE>
<S>                                                                                 <C>                     <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                                      of Ending
                                                                                           Delinquent Amount        Receivables
     Payment Status                                                                           Ending Balance        Outstanding

     30-59 days                                                                              $419,913,275.47               2.14%

     60-179 days                                                                             $911,502,585.27               4.65%
</TABLE>


                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President



<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1996-2 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of January 29, 1996 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-2 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $124,809,387.44

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $14,734,914.32

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off
          Amount is equal to                                                                                              $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $4,430,625.00
</TABLE>



<PAGE>   6

<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $6,554,541.13

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $773,824.82

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $238,720.02

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                    as Master Servicer

                               By:____________________________________
                               Vice President, Director of Accounting,
                               and Treasurer


<PAGE>   1
                                                                     EXHIBIT (L)

                     MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                        Series 1996-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAY5
                      Class B Certificate CUSIP #25466KAZ2


Trust Distribution Date: April 15, 1998      Due Period Ending:  March 31, 1998

Pursuant to the Series Supplement dated as of February 21, 1996 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                    <C>     

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)

     Series  1996-3                                                        Total                  Interest               Principal
             Class A      30 days at 6.050000000%                       $5.041666667            $5.041666667            $0.000000000

             Class B      30 days at 6.250000000%                       $5.208333333            $5.208333333            $0.000000000

2.   Principal Receivables at the end of the Due Period

      (a) Aggregate Investor Interest                                                                            $16,936,325,676.00
          Seller Interest                                                                                         $2,389,177,999.72

          Total Master Trust                                                                                     $19,325,503,675.72


      (b) Group One Investor Interest                                                                            $14,386,325,676.00

      (c) Group Two Investor Interest                                                                             $2,550,000,000.00

      (d) Series 1996-3 Investor Interest                                                                           $631,579,000.00

      (e) Class A Investor Interest                                                                                 $600,000,000.00

          Class B Investor Interest                                                                                  $31,579,000.00

     3.   Allocation of Receivables Collected During the 
          Due Period

                                                                      Finance Charge              Principal                Yield
                                                                       Collections               Collections            Collections

      (a) Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation.                             $277,319,470.48       $2,348,983,679.25                  $0.00

          Seller:                                                     $45,107,538.56         $382,075,126.99                  $0.00

      (b) Group One Allocation                                       $235,565,172.82       $1,995,311,563.84                  $0.00

      (c) Group Two Allocation                                        $41,754,297.66         $353,672,115.41                  $0.00

      (d) Series 1996-3 Allocations                                   $10,349,906.99          $87,666,987.68                  $0.00

      (e) Class A Allocations                                          $9,834,023.78          $83,297,293.59                   0.00

          Class B Allocations                                            $515,883.21           $4,369,694.09                   0.00
</TABLE>




<PAGE>   2



<TABLE>
<S>                                       <C>                               <C>                    <C>           <C>    

4.   Information Concerning the Series Principal Funding Accounts ("SPFA")

                                  Deposits into the
                                         SPFAs This                     SPFA         Deposit/Deficit             Investment
                                         Due Period                  Balance                  Amount                 Income

     Series 1996-3                            $0.00                    $0.00                    0.00                   0.00

5.   Information Concerning Amount of Controlled Liquidation Payments

                                                                                                             Total Payments
                                                                 Amount Paid          Deficit Amount           Through This
                                                             This Due Period         This Due Period             Due Period

     Series 1996-3                                                     $0.00                   $0.00                  $0.00

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")

                                                                                   Deposits Into the
                                                                                          SIFAs This
                                                                                          Due Period           SIFA Balance

     Series 1996-3                                                                     $3,189,473.96          $6,378,947.92

7.   Pool Factors                                                                                           This Due Period

     Class A                                                                                                     1.00000000

     Class B                                                                                                     1.00000000

8.   Investor Charged-Off Amount

                                                                                                            Cumulative
                                                                                                       Investor Charged-Off
                                                                                     This Due Period          Amount

      (a) Group One                                                                   $92,397,088.58                  $0.00

      (b) Group Two                                                                   $16,377,529.39                  $0.00

      (c) Series 1996-3                                                                $4,059,603.81                  $0.00

      (d) Class A                                                                      $3,857,255.96                  $0.00

          Class B                                                                        $202,347.85                  $0.00

9.   Investor Losses This Due Period

                                                                                                                 Per $1,000 of
                                                                                                               Original Invested
                                                                                               Total               Principal

      (a) Group One                                                                            $0.00                 $0.00

      (b) Group Two                                                                            $0.00                  $0.00

      (c) Series 1996-3                                                                        $0.00                  $0.00

      (d) Class A                                                                              $0.00                  $0.00

          Class B                                                                              $0.00                  $0.00
</TABLE>
<PAGE>   3

<TABLE>
<S>                                                                                   <C>        <C>
10.  Reimbursement of Investor Losses This Due Period                                                    Per $1,000 of
                                                                                                       Original Invested
                                                                                       Total               Principal

      (a) Group One                                                                    $0.00                  $0.00

      (b) Group Two                                                                    $0.00                  $0.00

      (c) Series 1996-3                                                                $0.00                  $0.00

      (d) Class A                                                                      $0.00                  $0.00

          Class B                                                                      $0.00                  $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses                                                     Per $1,000 of
                                                                                                        Original Invested
                                                                                       Total                Principal

      (a) Group One                                                                    $0.00                  $0.00

      (b) Group Two                                                                    $0.00                  $0.00

      (c) Series 1996-3                                                                $0.00                  $0.00

      (d) Class A                                                                      $0.00                  $0.00

          Class B                                                                      $0.00                  $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

      (a) Group One                                                                                  $23,977,209.44

      (b) Group Two                                                                                   $4,250,000.00

      (c) Series 1996-3                                                                               $1,052,631.67

      (d) Class A                                                                                     $1,000,000.00

          Class B                                                                                        $52,631.67

13.  Class Available Subordinated Amount at the end of the Due Period

                                                                                                      As a Percentage
                                                                                                        of Class A
                                                                                   Total              Invested Amount

          Series 1996-3 Class B                                               $37,894,740.00                 6.3158%

14.  Total Available Credit Enhancement Amounts

                                                                               Shared Amount         Class B Amount

          Maximum Amount                                                               $0.00         $18,947,370.00

          Available Amount                                                             $0.00         $18,947,370.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                         $0.00                  $0.00
</TABLE>



<PAGE>   4

<TABLE>
<S>                                                                                          <C>                 <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                        $19,619,869,946.98


                                                                                                           Percentage of
                                                                                  Delinquent                   Ending
                                                                                    Amount                  Receivables
     Payment Status                                                             Ending Balance              Outstanding
                                                                                                        

     30-59 days                                                                $419,913,275.47                  2.14%

     60-179 days                                                               $911,502,585.27                  4.65%
</TABLE>


                             U.S. BANK NATIONAL ASSOCIATION
                             as Trustee


                             BY: ____________________________
                             Vice President


<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1996-3 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of February 21, 1996 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-3 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S> <C>                                                                                  <C> 
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                           $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                           $83,297,293.59

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                        $9,834,023.78

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution date
     is equal to                                                                                       $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to
                                                                                                       $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                     $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                             $0.00
</TABLE>




<PAGE>   6

<TABLE>
<S>  <C>                                                                                      <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                            $4,369,694.09

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                          $515,883.21

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                       $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal                               $0.00
          to

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                     $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                             $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>


     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                             GREENWOOD TRUST COMPANY
                             as Master Servicer

                             By:____________________________________
                             Vice President, Director of Accounting,
                             and Treasurer




<PAGE>   1

                                                                    EXHIBIT (M)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1996-4 Monthly Statement
                      Class A Certificate CUSIP #25466KBA6
                      Class B Certificate CUSIP #25466KBB4


Trust Distribution Date: April 15, 1998       Due Period Ending:  March 31, 1998

     Pursuant to the Series Supplement dated as of April 30, 1996 relating to
     the Pooling and Servicing Agreement dated as of October 1, 1993 by and
     between Greenwood Trust Company and U.S. Bank National Association, as
     Trustee, the Trustee is required to prepare certain information each month
     regarding current distributions to Certificateholders and the performances
     of the Trust. The information for the Due Period and the Trust Distribution
     Date listed above is set forth below:


<TABLE>
<S>                                                                    <C>                     <C>              <C> 
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)

     Series  1996-4                                                         Total                 Interest              Principal
             Class A      30 days at 6.062500000%                       $5.052083333            $5.052083333           $0.000000000

             Class B      30 days at 6.237500000%                       $5.197916667            $5.197916667           $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                            $16,936,325,676.00

          Seller Interest                                                                                         $2,389,177,999.72

          Total Master Trust                                                                                     $19,325,503,675.72


     (b)  Group One Investor Interest                                                                            $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                             $2,550,000,000.00

     (d)  Series 1996-4 Investor Interest                                                                         $1,052,632,000.00

     (e)  Class A Investor Interest                                                                               $1,000,000,000.00

          Class B Investor Interest                                                                                  $52,632,000.00

3.   Allocation of Receivables Collected During the Due Period

                                                                     Finance Charge            Principal                    Yield
                                                                       Collections            Collections                Collections

     (a)  Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation.                             $277,319,470.48       $2,348,983,679.25                  $0.00

          Seller:                                                     $45,107,538.56         $382,075,126.99                  $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84                  $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41                  $0.00

     (d)  Series 1996-4 Allocations                                   $17,249,844.98         $146,111,646.14                  $0.00

     (e)  Class A Allocations                                         $16,379,292.06         $138,737,787.36                  $0.00

          Class B Allocations                                            $870,552.92           $7,373,858.78                  $0.00
</TABLE>



<PAGE>   2

<TABLE>
<S>  <C>                                 <C>                         <C>                   <C>                 <C>     
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit/Deficit             Investment
                                                 Due Period                  Balance                  Amount                 Income

     Series 1996-4                                    $0.00                    $0.00                    0.00                  $0.00

5.   Information Concerning Amount of Controlled Liquidation Payments

                                                                                                                     Total Payments
                                                                         Amount Paid          Deficit Amount           Through This
                                                                     This Due Period         This Due Period             Due Period

     Series 1996-4                                                             $0.00                   $0.00                  $0.00

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period           SIFA Balance

     Series 1996-4                                                                             $5,325,660.08                  $0.00

7.   Pool Factors                                                                                                   This Due Period

     Class A                                                                                                             1.00000000

     Class B                                                                                                             1.00000000

8.   Investor Charged-Off Amount

                                                                                                                         Cumulative
                                                                                                               Investor Charged-Off
                                                                                             This Due Period                 Amount

     (a)  Group One                                                                           $92,397,088.58                  $0.00

     (b)  Group Two                                                                           $16,377,529.39                  $0.00

     (c)  Series 1996-4                                                                        $6,766,006.35                  $0.00

     (d)  Class A                                                                              $6,424,544.35                  $0.00

          Class B                                                                                $341,462.00                  $0.00

9.   Investor Losses This Due Period

                                                                                                                      Per $1,000 of
                                                                                                                  Original Invested
                                                                                                       Total              Principal

     (a)  Group One                                                                                    $0.00                  $0.00

     (b)  Group Two                                                                                    $0.00                  $0.00

     (c)  Series 1996-4                                                                                $0.00                  $0.00

     (d)  Class A                                                                                      $0.00                  $0.00

          Class B                                                                                      $0.00                  $0.00
</TABLE>



<PAGE>   3

<TABLE>
<S>  <C>                                                                                              <C>        <C>      
10.  Reimbursement of Investor Losses This Due Period                                                                 Per $1,000 of
                                                                                                                  Original Invested
                                                                                                       Total              Principal

     (a)  Group One                                                                                    $0.00                  $0.00

     (b)  Group Two                                                                                    $0.00                  $0.00

     (c)  Series 1996-4                                                                                $0.00                  $0.00

     (d)  Class A                                                                                      $0.00                  $0.00

          Class B                                                                                      $0.00                  $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses                                                                 Per $1,000 of
                                                                                                                  Original Invested
                                                                                                       Total              Principal

     (a)  Group One                                                                                    $0.00                  $0.00

     (b)  Group Two                                                                                    $0.00                  $0.00

     (c)  Series 1996-4                                                                                $0.00                  $0.00

     (d)  Class A                                                                                      $0.00                  $0.00

          Class B                                                                                      $0.00                  $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

     (a)  Group One                                                                                                  $23,977,209.44

     (b)  Group Two                                                                                                   $4,250,000.00

     (c)  Series 1996-4                                                                                               $1,754,386.67

     (d)  Class A                                                                                                     $1,666,666.67

          Class B                                                                                                        $87,720.00

13.  Class Available Subordinated Amount at the end of the Due Period
                                                                                                                    As a Percentage
                                                                                                                         of Class A
                                                                                                       Total        Invested Amount

          Series 1996-4 Class B                                                              $115,789,520.00                11.5790%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount         Class B Amount

          Maximum Amount                                                                               $0.00         $63,157,920.00

          Available Amount                                                                             $0.00         $63,157,920.00

          Amount of Drawings on Credit Enhancement for
          this Due Period                                                                              $0.00                  $0.00
</TABLE>



<PAGE>   4

<TABLE>
<S>  <C>                                                                                    <C>                 <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                      $19,619,869,946.98

                                                                                                                      Percentage of
                                                                                                  Delinquent                 Ending
                                                                                                      Amount            Receivables
     Payment Status                                                                           Ending Balance            Outstanding

     30-59 days                                                                              $419,913,275.47                   2.14%

     60-179 days                                                                             $911,502,585.27                   4.65%
</TABLE>



                         U.S. BANK NATIONAL ASSOCIATION
                         as Trustee


                         BY: __________________________
                         Vice President

<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1996-4 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of April 30, 1996 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-4 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>  <C>                                                                                                     <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                             $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $138,737,787.36

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $16,379,292.06

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $5,052,083.33
</TABLE>




<PAGE>   6

<TABLE>
<S>  <C>                                                                                                          <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $7,373,858.78

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $870,552.92

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00 

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $273,576.75

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>


     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                             GREENWOOD TRUST COMPANY
                             as Master Servicer

                             By:____________________________________
                             Vice President, Director of Accounting,
                             and Treasurer




<PAGE>   1
                                                                    EXHIBIT (N)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1997-1 Monthly Statement
                      Class A Certificate CUSIP #25466KBD0
                      Class B Certificate CUSIP #25466KBE8


Trust Distribution Date: April 15, 1998      Due Period Ending:  March 31, 1998

Pursuant to the Series Supplement dated as of August 26, 1997 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     Class Initial Investor Interest)

<TABLE>
<S>       <C>                                                           <C>                    <C>              <C> 
     Series  1997-1                                                            Total                Interest              Principal
             Class A      30 days at 5.777500000%                       $4.814583333            $4.814583333           $0.000000000
             Class B      30 days at 5.957500000%                       $4.964583333            $4.964583333           $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                            $16,936,325,676.00

          Seller Interest                                                                                         $2,389,177,999.72

          Total Master Trust                                                                                     $19,325,503,675.72


     (b)  Group One Investor Interest                                                                            $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                             $2,550,000,000.00

     (d)  Series 1997-1 Investor Interest                                                                           $789,474,000.00

     (e)  Class A Investor Interest                                                                                 $750,000,000.00

          Class B Investor Interest                                                                                  $39,474,000.00

3.   Allocation of Receivables Collected During the Due Period

                                                                      Finance Charge               Principal                  Yield
                                                                         Collections             Collections            Collections

     (a)  Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation.                             $277,319,470.48       $2,348,983,679.25                  $0.00

          Seller:                                                     $45,107,538.56         $382,075,126.99                  $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84                  $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41                  $0.00

     (d)  Series 1997-1 Allocations                                   $12,929,323.07         $109,515,458.13                  $0.00

     (e)  Class A Allocations                                         $12,284,469.05         $104,053,340.52                  $0.00

          Class B Allocations                                            $644,854.02           $5,462,117.61                  $0.00
</TABLE>



<PAGE>   2

<TABLE>
<S>  <C>                                 <C>                          <C>                   <C>                  <C>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA                 Deposit     Deficit Investment
                                                 Due Period                  Balance                  Amount                 Income

     Series 1997-1                                    $0.00                    $0.00                    0.00                  $0.00

5.   Information Concerning Amount of Controlled Liquidation Payments

                                                                                                                     Total Payments
                                                                         Amount Paid          Deficit Amount           Through This
                                                                     This Due Period         This Due Period             Due Period

     Series 1997-1                                                             $0.00                   $0.00                  $0.00

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                                         SIFAs This
                                                                                                  Due Period           SIFA Balance

     Series 1997-1                                                                             $3,806,909.46                  $0.00

7.   Pool Factors                                                                                                   This Due Period

     Class A                                                                                                             1.00000000

     Class B                                                                                                             1.00000000

8.   Investor Charged-Off Amount

                                                                                                                         Cumulative
                                                                                                               Investor Charged-Off
                                                                                             This Due Period                 Amount

     (a)  Group One                                                                           $92,397,088.58                  $0.00

     (b)  Group Two                                                                           $16,377,529.39                  $0.00

     (c)  Series 1997-1                                                                        $5,071,343.08                  $0.00

     (d)  Class A                                                                              $4,818,408.26                  $0.00

          Class B                                                                                $252,934.82                  $0.00

9.   Investor Losses This Due Period

                                                                                                                      Per $1,000 of
                                                                                                                  Original Invested
                                                                                                       Total              Principal

     (a)  Group One                                                                                    $0.00                  $0.00

     (b)  Group Two                                                                                    $0.00                  $0.00

     (c)  Series 1997-1                                                                                $0.00                  $0.00

     (d)  Class A                                                                                      $0.00                  $0.00

          Class B                                                                                      $0.00                  $0.00
</TABLE>


<PAGE>   3


<TABLE>
<S>  <C>                                                                                              <C>        <C>      
10.  Reimbursement of Investor Losses This Due Period                                                                 Per $1,000 of
                                                                                                                  Original Invested
                                                                                                       Total              Principal

     (a)  Group One                                                                                    $0.00                  $0.00

     (b)  Group Two                                                                                    $0.00                  $0.00

     (c)  Series 1997-1                                                                                $0.00                  $0.00

     (d)  Class A                                                                                      $0.00                  $0.00

          Class B                                                                                      $0.00                  $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses                                                                 Per $1,000 of
                                                                                                                  Original Invested
                                                                                                       Total              Principal

     (a)  Group One                                                                                    $0.00                  $0.00

     (b)  Group Two                                                                                    $0.00                  $0.00

     (c)  Series 1997-1                                                                                $0.00                  $0.00

     (d)  Class A                                                                                      $0.00                  $0.00

          Class B                                                                                      $0.00                  $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

     (a)  Group One                                                                                                  $23,977,209.44

     (b)  Group Two                                                                                                   $4,250,000.00

     (c)  Series 1997-1                                                                                               $1,315,790.00

     (d)  Class A                                                                                                     $1,250,000.00

          Class B                                                                                                        $65,790.00

13.  Class Available Subordinated Amount at the end of the Due Period

                                                                                                                    As a Percentage
                                                                                                                         of Class A
                                                                                                       Total        Invested Amount

     Series 1997-1 Class B                                                                    $98,684,250.00               13.1579%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount         Class B Amount

     Maximum Amount                                                                                    $0.00         $59,210,550.00

     Available Amount                                                                                  $0.00         $59,210,550.00

     Amount of Drawings on Credit Enhancement for this
     Due Period                                                                                        $0.00                  $0.00
</TABLE>


<PAGE>   4

<TABLE>
<S>  <C>                                                                                    <C>                 <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                      $19,619,869,946.98

                                                                                                                      Percentage of
                                                                                                  Delinquent                 Ending
                                                                                                      Amount            Receivables
     Payment Status                                                                           Ending Balance            Outstanding

     30-59 days                                                                              $419,913,275.47                  2.14%

     60-179 days                                                                             $911,502,585.27                  4.65%
</TABLE>


                         U.S. BANK NATIONAL ASSOCIATION
                         as Trustee
                         BY: __________________________
                         Vice President

<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1997-1 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of August 26, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-1 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $104,053,340.52

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $12,284,469.05

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $3,610,937.50
</TABLE>



<PAGE>   6

<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $5,462,117.61

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $644,854.02

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $195,971.96

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                    as Master Servicer

                               By:____________________________________
                               Vice President, Director of Accounting,
                               and Treasurer




<PAGE>   1

                                                                     EXHIBIT (O)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1997-2 Monthly Statement
                      Class A Certificate CUSIP #25466KBF5
                      Class B Certificate CUSIP #25466KBG3


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of October 15, 1997 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                 <C>             <C>                     <C>
1.   Payments for the benefit of Series Investors this Due
     Period (per $1000 of Class Initial Investor Interest)

          Series  1997-2                                                       Total                Interest          Principal
             Class A      30 days at 6.792000000%                       $5.660000000            $5.660000000       $0.000000000

             Class B      30 days at 6.087500000%                       $5.072916667            $5.072916667       $0.000000000

2.   Principal Receivables at the end of the Due
     Period

     (a)  Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


     (b)  Group One Investor Interest                                                                        $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                         $2,550,000,000.00

     (d)  Series 1997-2 Investor Interest                                                                       $526,316,000.00

     (e)  Class A Investor Interest                                                                             $500,000,000.00

          Class B Investor Interest                                                                              $26,316,000.00

3.   Allocation of Receivables Collected During the
     Due Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

     (a)  Allocation of Collections between Investor
          and Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

     (d)  Series 1997-2 Allocations                                    $8,608,801.14          $72,919,270.13              $0.00

     (e)  Class A Allocations                                          $8,189,646.03          $69,368,893.68              $0.00

          Class B Allocations                                            $419,155.11           $3,550,376.45              $0.00
</TABLE>



<PAGE>   2


<TABLE>
<S>                                      <C>               <C>                      <C>                     <C>
4.   Information Concerning the Series
     Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1997-2                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                     Amount Paid                  PSA Index                  Monthly          Deficit Amount       Through This
                  This Due Period                     Rate*       Amortization Rate*         This Due Period         Due Period

          Class A        $0.00                          N/A                      N/A                   $0.00              $0.00

          Class B        $0.00                          N/A                      N/A                   $0.00              $0.00

     *Rates are only applicable during
     the Class A Controlled Liquidation
     Period.

6.   Information Concerning the Series
     Interest Funding Accounts ("SIFA")
                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1997-2                                                                        $2,963,498.88              $0.00

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1997-2                                                                        $3,376,679.80              $0.00

     (d)  Class A                                                                              $3,212,272.17              $0.00

          Class B                                                                                $164,407.63              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1997-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>



<PAGE>   3

<TABLE>
<S>                                                                                 <C>                     <C>
10.  Reimbursement of Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1997-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1997-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end
     of the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1997-2                                                                                             $877,193.33

     (d)  Class A                                                                                                   $833,333.33

          Class B                                                                                                    $43,860.00

13.  Class Available Subordinated Amount at the end of
     the Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1997-2 Class B                                                               $47,368,440.00            9.4737%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

     Maximum Amount                                                                                    $0.00     $21,052,640.00

     Available Amount                                                                                  $0.00     $21,052,640.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                                                                             $0.00              $0.00
</TABLE>



<PAGE>   4


<TABLE>
<S>                                                                                 <C>                     <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                  Delinquent          of Ending
                                                                                                      Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47              2.14%

          60-179 days                                                                        $911,502,585.27              4.65%
</TABLE>


                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President



<PAGE>   5


                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1997-2 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 15, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-2 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:

<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                              $69,368,893.68

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                           $8,189,646.03

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution date
     is equal to $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $2,830,000.00
</TABLE>



<PAGE>   6

<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $3,550,376.45

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $419,155.11

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $133,498.88

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                    as Master Servicer

                               By:____________________________________
                               Vice President, Director of Accounting,
                               and Treasurer




<PAGE>   1
                                                                     EXHIBIT (P)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1997-3 Monthly Statement
                      Class A Certificate CUSIP #25466KBH1
                      Class B Certificate CUSIP #25466KBJ7


Trust Distribution Date: April 15, 1998       Due Period Ending:  March 31, 1998

Pursuant to the Series Supplement dated as of October 23, 1997 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                 <C>              <C>                    <C>
1.   Payments for the benefit of Series Investors this Due
     Period (per $1000 of Class Initial Investor Interest)

          Series  1997-3                                                       Total                Interest          Principal
             Class A      30 days at 5.817500000%                       $4.847916667            $4.847916667       $0.000000000

             Class B      30 days at 5.997500000%                       $4.997916667            $4.997916667       $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


     (b)  Group One Investor Interest                                                                        $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                         $2,550,000,000.00

     (d)  Series 1997-3 Investor Interest                                                                       $684,211,000.00

     (e)  Class A Investor Interest                                                                             $650,000,000.00

          Class B Investor Interest                                                                              $34,211,000.00

3.   Allocation of Receivables Collected During the
     Due Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

     (a)  Allocation of Collections between Investor
          and Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

     (d)  Series 1997-3 Allocations                                   $11,188,217.21          $94,767,740.58              $0.00

     (e)  Class A Allocations                                         $10,640,091.30          $90,124,940.61              $0.00

          Class B Allocations                                            $548,125.91           $4,642,799.97              $0.00
</TABLE>



<PAGE>   2


<TABLE>
<S>                                      <C>               <C>                      <C>                     <C>
4.   Information Concerning the Series
     Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1997-3                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1997-3                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1997-3                                                                        $3,322,129.56              $0.00

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1997-3                                                                        $4,388,419.07              $0.00

     (d)  Class A                                                                              $4,173,424.48              $0.00

          Class B                                                                                $214,994.59              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1997-3                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>



<PAGE>   3


<TABLE>
<S>                                                                                 <C>                     <C>
10.  Reimbursement of Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1997-3                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1997-3                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of
     the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1997-3                                                                                           $1,140,351.66

     (d)  Class A                                                                                                 $1,083,333.33

          Class B                                                                                                    $57,018.33

13.  Class Available Subordinated Amount at the end of the
     Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1997-3 Class B                                                               $85,526,375.00            13.1579%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $51,315,825.00

          Available Amount                                                                             $0.00     $51,315,825.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>



<PAGE>   4


<TABLE>
<S>                                                                                 <C>                     <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                                      of Ending
                                                                                           Delinquent Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President



<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1997-3 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 23, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-3 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                              $90,124,940.61

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $10,640,091.30

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $3,151,145.83
</TABLE>



<PAGE>   6


<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $4,642,799.97

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $548,125.91

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $170,983.73

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>


     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                    as Master Servicer

                               By:____________________________________
                               Vice President, Director of Accounting,
                               and Treasurer



<PAGE>   1
                                                                     EXHIBIT (Q)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1997-4 Monthly Statement
                      Class A Certificate CUSIP #25466KBK4
                      Class B Certificate CUSIP #25466KBL2


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of October 31, 1997 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                          <C>                    <C>                     <C>
1.   Payments for the benefit of Series Investors this Due
     Period (per $1000 of Class Initial Investor Interest)

          Series  1997-4                                                       Total                Interest          Principal
             Class A      30 days at 5.757500000%                       $4.797916667            $4.797916667       $0.000000000

             Class B      30 days at 5.937500000%                       $4.947916667            $4.947916667       $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                        $16,936,325,676.00
          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


     (b)  Group One Investor Interest                                                                        $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                         $2,550,000,000.00

     (d)  Series 1997-4 Investor Interest                                                                       $789,474,000.00

     (e)  Class A Investor Interest                                                                             $750,000,000.00

          Class B Investor Interest                                                                              $39,474,000.00

3.   Allocation of Receivables Collected During the Due
     Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

     (a)  Allocation of Collections between Investor and
          Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

     (d)  Series 1997-4 Allocations                                   $12,929,323.07         $109,515,458.13              $0.00

     (e)  Class A Allocations                                         $12,284,469.05         $104,053,340.52              $0.00

          Class B Allocations                                            $644,854.02           $5,462,117.61              $0.00
</TABLE>



<PAGE>   2


<TABLE>
<S>                                      <C>               <C>                      <C>                     <C>
4.   Information Concerning the Series
     Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1997-4                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1997-4                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1997-4                                                                        $3,793,751.56              $0.00

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount
                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1997-4                                                                        $5,071,343.08              $0.00

     (d)  Class A                                                                              $4,818,408.26              $0.00

          Class B                                                                                $252,934.82              $0.00

9.   Investor Losses This Due Period
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1997-4                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>



<PAGE>   3

<TABLE>
<S>                                                                                 <C>                     <C>
10.  Reimbursement of Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1997-4                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1997-4                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of
     the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1997-4                                                                                           $1,315,790.00

     (d)  Class A                                                                                                 $1,250,000.00

          Class B                                                                                                    $65,790.00

13.  Class Available Subordinated Amount at the end of the
     Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1997-4 Class B                                                               $98,684,250.00           13.1579%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $59,210,550.00

          Available Amount                                                                             $0.00     $59,210,550.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>



<PAGE>   4


<TABLE>
<S>                                                                                 <C>                     <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                                      of Ending
                                                                                           Delinquent Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President


<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1997-4 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 31, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-4 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $104,053,340.52

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $12,284,469.05

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $3,598,437.50
</TABLE>



<PAGE>   6


<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $5,462,117.61

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $644,854.02

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $195,314.06

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                                    GREENWOOD TRUST COMPANY
                                         as Master Servicer

                                    By:____________________________________
                                    Vice President, Director of Accounting,
                                    and Treasurer



<PAGE>   1
                                                                     EXHIBIT (R)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1998-1 Monthly Statement
                      Class A Certificate CUSIP #25466KBM0
                      Class B Certificate CUSIP #25466KBN8


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of January 14, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                <C>              <C>                     <C>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)

          Series  1998-1                                                       Total                Interest          Principal
             Class A      30 days at 5.777500000%                       $4.814583333            $4.814583333       $0.000000000

             Class B      30 days at 5.957500000%                       $4.964583333            $4.964583333       $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                        $16,936,325,676.00

          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


     (b)  Group One Investor Interest                                                                        $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                         $2,550,000,000.00

     (d)  Series 1998-1 Investor Interest                                                                       $368,422,000.00

     (e)  Class A Investor Interest                                                                             $350,000,000.00

          Class B Investor Interest                                                                              $18,422,000.00

3.   Allocation of Receivables Collected During the Due
     Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

     (a)  Allocation of Collections between Investor and
          Seller

          Aggregate Investor Allocation.                             $277,319,470.48       $2,348,983,679.25              $0.00

          Seller:                                                     $45,107,538.56         $382,075,126.99              $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

     (d)  Series 1998-1 Allocations                                    $6,029,385.07          $51,070,799.68              $0.00

     (e)  Class A Allocations                                          $5,739,200.76          $48,612,846.75              $0.00

          Class B Allocations                                            $290,184.31           $2,457,952.93              $0.00
</TABLE>



<PAGE>   2

<TABLE>
<S>                                      <C>                  <C>                   <C>                     <C>
4.   Information Concerning the Series
     Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1998-1                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1998-1                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1998-1                                                                        $1,776,561.72              $0.00

7.   Pool Factors

                                                                                             This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1998-1                                                                        $2,364,940.54              $0.00

     (d)  Class A                                                                              $2,251,119.87              $0.00

          Class B                                                                                $113,820.67              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1998-1                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>




<PAGE>   3


<TABLE>
<S>                                                                                 <C>                     <C>
10.  Reimbursement of Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1998-1                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses
                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1998-1                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of
     the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1998-1                                                                                             $614,036.66

     (d)  Class A                                                                                                   $583,333.33

          Class B                                                                                                    $30,703.33

13.  Class Available Subordinated Amount at the end of the
     Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1998-1 Class B                                                               $46,052,750.00            13.1579%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $27,631,650.00

          Available Amount                                                                             $0.00     $27,631,650.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>



<PAGE>   4


<TABLE>
<S>                                                                              <C>                        <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                                      of Ending
                                                                                           Delinquent Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>



                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President



<PAGE>   5


                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1998-1 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the "Pooling & Servicing Agreement") and
the Series Supplement, dated as of January 14, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-1 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                              $48,612,846.75

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                           $5,739,200.76

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $1,685,104.17
</TABLE>



<PAGE>   6



<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $2,457,952.93

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $290,184.31

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                           $91,457.55

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                    as Master Servicer

                               By:____________________________________
                               Vice President, Director of Accounting,
                               and Treasurer



<PAGE>   1
                                                                     EXHIBIT (S)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1998-2 Monthly Statement
                      Class A Certificate CUSIP #25466KBP3
                      Class B Certificate CUSIP #25466KBQ1


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of March 4, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                                <C>              <C>                     <C>
1.   Payments for the benefit of Series Investors this Due
     Period (per $1000 of Class Initial Investor Interest)

          Series  1998-2                                                       Total                Interest          Principal
             Class A      41 days at 5.800000000%                       $6.605555556            $6.605555556       $0.000000000

             Class B      41 days at 5.950000000%                       $6.776388889            $6.776388889       $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                        $16,936,325,676.00

          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


     (b)  Group One Investor Interest                                                                        $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                         $2,550,000,000.00

     (d)  Series 1998-2 Investor Interest                                                                       $526,316,000.00

     (e)  Class A Investor Interest                                                                             $500,000,000.00

          Class B Investor Interest                                                                              $26,316,000.00

3.   Allocation of Receivables Collected During the Due Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

     (a)  Allocation of Collections between Investor and
          Seller

          Aggregate Investor Allocation                              $277,319,470.48       $2,348,983,679.25              $0.00

          Seller                                                      $45,107,538.56         $382,075,126.99              $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

     (d)  Series 1998-2 Allocations                                    $8,608,801.14          $72,919,270.13              $0.00

     (e)  Class A Allocations                                          $8,189,646.03          $69,368,893.68              $0.00

          Class B Allocations                                            $419,155.11           $3,550,376.45              $0.00
</TABLE>

<PAGE>   2

<TABLE>
<S>                                      <C>                         <C>            <C>                     <C>

4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     
                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1998-2                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1998-2                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                  Due Period       SIFA Balance

          Series 1998-2                                                                        $3,481,105.23      $3,481,105.23

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1998-2                                                                        $3,376,679.80              $0.00

     (d)  Class A                                                                              $3,212,272.17              $0.00

          Class B                                                                                $164,407.63              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1998-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

</TABLE>
<PAGE>   3
<TABLE>
<S>                            <C>                        <C>                         <C>                     <C> 
10.  Reimbursement of Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1998-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1998-2                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1998-2                                                                                             $877,193.33

     (d)  Class A                                                                                                   $833,333.33

          Class B                                                                                                    $43,860.00

13.  Class Available Subordinated Amount at the end of the Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1998-2 Class B                                                               $44,736,860.00             8.9474%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $21,052,640.00

          Available Amount                                                                             $0.00     $21,052,640.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>



<PAGE>   4


<TABLE>
<S>                                                                              <C>                        <C>

15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                                      of Ending
                                                                                           Delinquent Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President


<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1998-2 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of March 4, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-2 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                              $69,368,893.68

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                           $8,189,646.03

6    a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6    b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                                $0.00
</TABLE>



<PAGE>   6


<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $3,550,376.45

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $419,155.11

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                                $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                    as Master Servicer

                               By:____________________________________
                               Vice President, Director of Accounting,
                               and Treasurer


<PAGE>   1
                                                                     EXHIBIT (T)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1998-3 Monthly Statement
                      Class A Certificate CUSIP #25466KBR9
                      Class B Certificate CUSIP #25466KBS7


Trust Distribution Date: April 15, 1998        Due Period Ending: March 31, 1998

Pursuant to the Series Supplement dated as of March 25, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<S>                                                               <C>                  <C>                     <C>
1.   Payments for the benefit of Series Investors this Due
     Period (per $1000 of Class Initial Investor Interest) 

          Series  1998-3                                                       Total                Interest          Principal
             Class A      21 days at 5.812500000%                       $3.390625000            $3.390625000       $0.000000000

             Class B      21 days at 5.977500000%                       $3.486875000            $3.486875000       $0.000000000

2.   Principal Receivables at the end of the Due Period

     (a)  Aggregate Investor Interest                                                                        $16,936,325,676.00

          Seller Interest                                                                                     $2,389,177,999.72

          Total Master Trust                                                                                 $19,325,503,675.72


     (b)  Group One Investor Interest                                                                        $14,386,325,676.00

     (c)  Group Two Investor Interest                                                                         $2,550,000,000.00

     (d)  Series 1998-3 Investor Interest                                                                       $789,474,000.00

     (e)  Class A Investor Interest                                                                             $750,000,000.00

          Class B Investor Interest                                                                              $39,474,000.00

3.   Allocation of Receivables Collected During the Due
     Period

                                                                      Finance Charge               Principal              Yield
                                                                         Collections             Collections        Collections

     (a)  Allocation of Collections between Investor and
          Seller

          Aggregate Investor Allocation.                             $277,319,470.48       $2,348,983,679.25              $0.00

          Seller:                                                     $45,107,538.56         $382,075,126.99              $0.00

     (b)  Group One Allocation                                       $235,565,172.82       $1,995,311,563.84              $0.00

     (c)  Group Two Allocation                                        $41,754,297.66         $353,672,115.41              $0.00

     (d)  Series 1998-3 Allocations                                   $12,929,323.07         $109,515,458.13              $0.00

     (e)  Class A Allocations                                         $12,284,469.05         $104,053,340.52              $0.00

          Class B Allocations                                            $644,854.02           $5,462,117.61              $0.00
</TABLE>



<PAGE>   2

<TABLE>
<S>                                       <C>                   <C>                      <C>                <C>
4.   Information Concerning the Series
     Principal Funding Accounts ("SPFA")

                                          Deposits into the
                                                 SPFAs This                     SPFA         Deposit Deficit         Investment
                                                 Due Period                  Balance                  Amount             Income

          Series 1998-3                               $0.00                    $0.00                    0.00              $0.00

5.   Information Concerning Amount of
     Controlled Liquidation Payments

                                                                                                                 Total Payments
                                                                         Amount Paid          Deficit Amount       Through This
                                                                     This Due Period         This Due Period         Due Period

          Series 1998-3                                                        $0.00                   $0.00              $0.00

6.   Information Concerning the Series
     Interest Funding Accounts ("SIFA")

                                                                                           Deposits Into the
                                                                                                  SIFAs This
                                                                                                   DuePeriod       SIFA Balance

          Series 1998-3                                                                        $2,680,609.65              $0.00

7.   Pool Factors

                                                                                                                This Due Period

          Class A                                                                                                    1.00000000

          Class B                                                                                                    1.00000000

8.   Investor Charged-Off Amount

                                                                                                                     Cumulative
                                                                                                                Investor Charged-Off
                                                                                             This Due Period             Amount

     (a)  Group One                                                                           $92,397,088.58              $0.00

     (b)  Group Two                                                                           $16,377,529.39              $0.00

     (c)  Series 1998-3                                                                        $5,071,343.08              $0.00

     (d)  Class A                                                                              $4,818,408.26              $0.00

          Class B                                                                                $252,934.82              $0.00

9.   Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1998-3                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00
</TABLE>



<PAGE>   3


<TABLE>
<S>                                                                                 <C>                     <C>      
10.  Reimbursement of Investor Losses This Due Period

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1998-3                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

11.  Aggregate Amount of Unreimbursed Investor Losses

                                                                                                                  Per $1,000 of
                                                                                                              Original Invested
                                                                                                       Total          Principal

     (a)  Group One                                                                                    $0.00              $0.00

     (b)  Group Two                                                                                    $0.00              $0.00

     (c)  Series 1998-3                                                                                $0.00              $0.00

     (d)  Class A                                                                                      $0.00              $0.00

          Class B                                                                                      $0.00              $0.00

12.  Investor Monthly Servicing Fee Payable at the
     end of the Due Period

     (a)  Group One                                                                                              $23,977,209.44

     (b)  Group Two                                                                                               $4,250,000.00

     (c)  Series 1998-3                                                                                           $1,315,790.00

     (d)  Class A                                                                                                 $1,250,000.00

          Class B                                                                                                    $65,790.00

13.  Class Available Subordinated Amount at the end
     of the Due Period

                                                                                                                As a Percentage
                                                                                                                     of Class A
                                                                                                       Total    Invested Amount

          Series 1998-3 Class B                                                               $98,684,250.00            13.1579%

14.  Total Available Credit Enhancement Amounts

                                                                                               Shared Amount     Class B Amount

          Maximum Amount                                                                               $0.00     $59,210,550.00

          Available Amount                                                                             $0.00     $59,210,550.00

          Amount of Drawings on Credit Enhancement
           for this Due Period                                                                         $0.00              $0.00
</TABLE>




<PAGE>   4


<TABLE>
<S>                                                                                 <C>                     <C>
15.  Delinquency Summary

     End of Due Period Master Trust Receivables Outstanding                                                  $19,619,869,946.98

                                                                                                                     Percentage
                                                                                                                      of Ending
                                                                                           Delinquent Amount        Receivables
          Payment Status                                                                      Ending Balance        Outstanding

          30-59 days                                                                         $419,913,275.47               2.14%

          60-179 days                                                                        $911,502,585.27               4.65%
</TABLE>


                                     U.S. BANK NATIONAL ASSOCIATION
                                     as Trustee


                                     BY: ____________________________
                                     Vice President



<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1998-3 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of March 25, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-3 Master Trust Certificates for the Distribution Date
occurring on April 15, 1998:


<TABLE>
<S>                                                                                                         <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due Period
     is equal to                                                                                              $3,053,485,815.26

4.   The aggregate amount of Class A Principal Collections processed during the
     related Due Period is equal to                                                                             $104,053,340.52

5.   The aggregate amount of Class A Finance Charge Collections processed during
     the related Due Period is equal to                                                                          $12,284,469.05

6    a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

6    b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                                     $0.00

7.   The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class A Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class A Investor Interest is equal to                                                       $0.00

8.   The sum of all amounts payable to the Class A Certificateholders on the
     current Distribution Date is equal to                                                                        $2,542,968.75
</TABLE>



<PAGE>   6

<TABLE>
<S>                                                                                                         <C>
9.   The aggregate amount of Class B Principal Collections processed during the
     related Due Period is equal to                                                                               $5,462,117.61

10.  The aggregate amount of Class B Finance Charge Collections processed during
     the related Due Period is equal to                                                                             $644,854.02

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                                   $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution date
     is equal to                                                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be made on
     the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall is equal to                                               $0.00

     (b)  with respect to the Class B Cumulative Investor Charged-Off Amount is
          equal to                                                                                                        $0.00

     (c)  with respect to the Class B Investor Interest is equal to                                                       $0.00

13.  The sum of all amounts payable to the Class B Certificateholders on the
     current Distribution Date is equal to                                                                          $137,640.90

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant
     to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of April, 1998.



                               GREENWOOD TRUST COMPANY
                                    as Master Servicer

                               By:____________________________________
                               Vice President, Director of Accounting,
                               and Treasurer





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