Exercise 3.  Find all the values of z for which each equation holds.  

3 (a).  .  

Solution 3 (a).

See text and/or instructor's solution manual.

Answer.   .

Solution.   

                       

We are done.   

Aside.  We can let Mathematica double check our work.

                                        The value      which solves the equation   .  
                                        This mapping is given by the function  .

This solution is complements of the authors.

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