Solution 14.

Solution.   Starting with      rearrange and obtain  

                        then get

                        next we obtain   

                        and then   

                    .   
    
Therefore, equation (10-18) can be written in the form of equation (10-13) :

    .  

We are done.   

Aside.  We can let Mathematica double check our work.

Substitute    into the formula for    and get:

Substitute    into the formula for    and get:

Substitute    into the formula for    and get:

We are really done.   

Aside.   The solution could also be expressed  ,  where  

      

Since this is a tedious computation, we shall check it out using Mathematica.

This solution is complements of the authors.

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