find the g(x) with equations

Question

f(x) = x^3

h(x) = (x + 7)^3

Express the function h(x) = (x + 7)^3 in the form of fog.

f(x) = x^3, find the function g(x).

Answer 1

f ο g (x) = (x + 7)³ , so g(x) is the inside function (the one inside the parentheses), the expression that is being cubed. Thus g(x) = x + 7.