Not sure how to do this problem need a little help at least to start.

Question

If h(x) = 1/(x+3)^3 then determine
f(x) and g(x) such that h(x) = (f of g)(x).

Answer 1

I read your (f of g)(x) as f( g(x) )

By the "Just look at it" theorem,
if g(x) = x+3
and f(x) = 1/x^3

then f(g(x))
= f(x+3)
= 1/(x+3)^3 , which is h(x)

Answer 2

Thanks for your help