Question

If f(x) = x + 1, and g(x) = 2x,
then
gf(x)) = ?

Answer 1

2x(x+1)
Distribute
2x^2+2x

Answer 2

Explanation:

If f(x)=x+1 and g(x)=2x then

g(f(x))=2(x+1)

g(f(x))=2x+2