3- 6,7,8

0-1 6. If c(x) = (a b)(x), then A. c (x) = a(b(x) ) B . c(x) = bla(x) C . c(x) = a(x)b(x) D . c (x) = (bo a)(x) Hint: Refer to the rules for composing functions. 7. If h (x) = f(g (x)) = 5/1 - 4x and f(x) = 5/x, then g(x) is A. -4x B. 5x C. 1 - 4x D. V1 - 4x Hint: Think about how h(x) is produced. 8. If f(x) = 2*+ + 5 and g(x) = x"', the range of g(f(x)) is . y > 1.5 B. 0 5 D. 0 Ky