What are the answer to the MC?

11) If f(x ) = 24- 1 32-2, then f'(x) = A) _-7 B) 12x 1 (20+1) (2x+1)2 C) ? D) 12x 1 1 (2 +1)? (2z . 1)2 12) The graph of the derivative of function f is shown below. =f'(x) Where on the interval [-2,3] is function f decreasing? A) [0,3] B) [1,3] C) [-2,3] D) [-2,0] 13) If a # 0, then lim 2 2 2 = A) 1 B) a2 ")-1 D) nonexistent 14) For what values of x is the graph of f(x) = x3 + 6.x2 + 9x + 3 decreasing? A) -3Exs -1, only C) x s -1, only B)xs -3 orx 2 -1, only D) x 2 -3, only