4. Below is the graph of f(x). For what values of x is f(x) concave down? a. x 1 b. -1 1 5. Which of the following is true for the interval (2, oo) for the graph of f(x) shown below? a. f'(x) > 0,f "(x) >0 c. f'(x) 0 b . f' ( x ) > 0,f " ( x ) 5, then which choice is not a possibility for f'(x)? a. f' ( x ) = x-5 c. f'(x) =-x2+ 10x-25 b. f' ( x ) = 5-x d. f'(x) =-5 7. Let f(x) = - 3x + 2x2 + x+1 . What types of asymptotes does f(x) have? x- +x - 2 a. horizontal and vertical asymptotes c. horizontal and oblique asymptotes b. oblique and vertical asymptotes d. None 8. Let f(x) 3x"+ What is the equation of the horizontal asymptote of f(x)? 4x2 - 16 3 a. X= C. b. x =2 d. y =2