Question

If given f(x) = –4x – 2 and g(x) = 2x, what is (f · g)(x)?

A. (f · g)(x) = –6x – 4
B. (f · g)(x) = –8x2 – 4x
C. (f · g)(x) = –6x – 2
D. (f · g)(x) = –16x^2 – 4x

Answer 1

(f o g)(x) = f(g(x)) = f(2x) = -4(2x) - 2 = -8x - 2