Question

Given f(x)=-6x-1 and g(x)=x^3,choose the expression for (f g)(x)

A.-18x^3-3
B.-6x^3-1
c.-6x^3-1x^3
D.(-6x-1)^3

Answer 1

I hope this helps you f (g (x))=f (x^3)=? x=x^3 f (x^3)= -6.x^3-1

Answer 2

The answer is B. You have to substitute x^3 into the equation for f(x) giving you B.