Exercise 2.  Use     and      and prove that   .  

Solution 2.

See text and/or instructor's solution manual.

We are done.   

Aside.  We can let Mathematica double check our work.

Aside.  We can use Mathematica's ZTransform subroutine.

To get the desired form of the answer the numerator and denominator must be simplified.

          The Maple code is similar

  

                                                            

This solution is complements of the authors.

(c) 2008 John H. Mathews, Russell W. Howell