### Home > CCA2 > Chapter 9 > Lesson 9.1.1 > Problem 9-12

9-12.

Verify algebraically that *g*(*x*) = *f*(*x*) =

Substitute *f*(*x*) into *g*(*x*). Simplify.

Substitute *g*(*x*) into *f*(*x*). Simplify.

Since *f*(*g*(*x*)) = *g*(*f*(*x*)) = *x*, they are inverse functions.