Question

The functions f and g are defined as follows. f(x)=-4 x-4 quad g(x)=2 x^3+2 Find f(6) and g(-4). Simplify your answers as much as possible.

Answer 1

f(6) = -28

g(-4) = -126

Explanation:

Lets find f(6) first:

f(x) = -4x-4

so f(6) would mean that x=6, so substitute 6 for x:

f(6) = -4*(6)-4 = -24-4 = -28

Now g(-4)

g(x) = 2x^3+2

we do the same here

g(-4) = 2(-4)^3+2 = 2*-64+2 = -128+2 = -126

:)