Exercise 7.  Let  .  

7 (a).  Find    as    along the line  .  

Solution 7 (a).

See text and/or instructor's solution manual.

Answer.  .  

Solution.  A parameterization of the line is  ,  and    as    along the line    is given by the limit   

          

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