Question

Can someone check:

f(x) = x^2 + 3; g(x) = 6x

Which is equal to (f ◦ g)(x)?

A. 36x^2 + 3

B. 36x^2 + 18

C. 6x^3 + 18x

D. 6x^2 + 3

My answer: A

Answer 1

f(x) =x^2 + 3 f(g(x))= [g(x)] ^2 + 3 = (6x)^2 + 3 = 36x^2 + 3 Yeah you are right.