Problem 7. (1 point) Let f(x) = 3x - 2x-. Then the expression f(xth) -f(x) h can be written in the form Ah + Bx +C, where A, B, and C are constants. (Note: It's possible for one or more of these constants to be 0.) Find the constants. A = - B = C =. Use your answer from above to find lim J(* th) -f(x) h-+0 h lim f(xth) -f(x) 1 -+0 h Finally, find each of the following: f' (1) = _ f' (2) = _ f' (3) = _Problem 4. (5 poinls) Use the given graph of the function to nd the xvalues for which f is not differentiable. B Answer (separate by commas): x : Note: You can click on the graph to enlarge the image. Problem 5. (5 points) Suppose that f(x+h) f(x) = 3m 7h+4k2. Find {1:}. f ' (x) = Problem 6. (l polnl) 4.x x