answer:

6) Determine the intervals of x for which the graph of f(x) = x + is concave up or concave down. X a) O Concave up for all real values b) O Concave up when x 0, concave down when x = 0 C) O Concave up when x 0 do Concave down for all real values7) Find the points of inflexion of a function f(x), given f"(x) is continuous: f"(-2) = 2, f"(-1) = 0, f"(1) = -2, f"(2) = 0, f"(3) = 4, f(-2) = 0, f(-1) = 2, f(1) = 5, f(2) = 1, f(3) = 0. a) O (-1, 2) and (2, 1) b) O (-1, 2) only c) (1, 5) and (2, 1) d) o (1, 5) only