Question

F(x)=-4x+7 and g(x)=x^3 choose the expression for (fog)(x)

Answer 1

(fog)(x) = -4x^3 + 7.

Explanation:

We can think of (f o g)(x) as f(g(x)). This shows that we plug in the entire g(x) function for x in f(x) and simplify:

f(x^3) = -4(x^3) + 7

f(x^3) = -4x^3 + 7

Thus, (f o g)(x) = -4x^3 + 7