Question

Let f(x)=x^2+2 and g(x)=2x,find (fog)( x)

Answer 1

(fog)( x) = 4x² + 2

Explanation:

f(x) = x² + 2

g(x) = 2x

To find (fog)( x) substitute g(x) into f(x) that's for every x in f (x) replace it with g (x)

We have

(fog)( x) = ( 2x)² + 2

We have the final answer as

(fog)( x) = 4x² + 2

Hope this helps you