quotient) with greater slopes than the tangent line. In both cases, f is
concave upward.(D) (f g)′ at x = 3 equals f ′(g (3))· g′(3) equals cos u (at u = 0) times 2x
(at x = 3) = 1 · 6 = 6.(E) Here f ′(x) equals (A)(A)(B) Note that