(1) Find the following derivatives.

(a)            


(b)                                     



(c)   




(3) Suppose    and    Find all the values of x for which the slope of the tangent to at equals the slope of the tangent to   at .

We are looking for all x that satisfy
f '(x) = g '(x)











(difference of two squares)

(difference of two squares again)
  
x = 2 or x = -2

Thus, x equals plus or minus 2 is the answer to the question.