Question

If F(x) = 3log x and G(x) = x^2 + 1
, find G[F(x)]

A. (3logx)^2 + 1
B. 3log(x^2 + 1)
C. 3(x^2 +1)logx

Answer 1

put f(x) in for x everywhere in g(x)

g(f(x)) = f(x)^2 +1

          = (3log(x))^2 +1

         

Choice A