Question

Let f(x)=2x^2 and g(x)=x^-2 find f(g(x))

Answer 1

2x^-4 or 2/x^4.

Explanation:

We replace the x in f(x) by g(x).

f(g(x)) = 2 (x^-2)^2

= 2 x^(-2*2)

= 2x^-4

= 2/x^4.