ADVANCED EXERCISES

(1)

              1
Given f(x) = ---, evaluate and simplify the following:
             

 (a) f(x) - f(5)
     -----------
         x - 5

 (b) f(9 + h) - f(9)
     ---------------
            h

 (c) f(x + h) - f(x)
     ---------------
            h

HINT:

Substitute, rationalize, simplify