f ( x) = cx+d for xs2 x2 - cx for x > 2 20. Let f be a function defined above, where c and d are constants. If fis differentiable at x = 2, what is the value of c + d? (A) - 4 (B) - 2 (C) 0 (D) 2 (E) 4 21. Let f be a differentiable function such that f (3) = 15, f (6) = 3, f'(3) = -18, and f' (6) = -2. The function g is differentiable and g(x) = f-'(x) for all x. What is the value of g'(3)? (A) (B) 8 (C ) (D) W / - (E) The value of g'(3) cannot be determined from the information given. X 3 5 7 . 9 h (x) 2 3 3 4 5 22. Using the table of value shown above for the continuous function h(x), which of the following is the approximation of [h(x)dx using trapezoids with equal subintervals? (A) 27 (B) 26 (C) 24 (D) 22 (E) 20