Exercise 14.  Let n be a positive integer.  Show that  

14 (b).  ,  which is the same as  .  

Solution 14 (b).

See text and/or instructor's solution manual.

Solution.   Using part 14 (a) we have  ,  and we obtain  

                     

We are done.   

Aside.  We can let Mathematica double check our work.

This solution is complements of the authors.

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