### Home > CCA2 > Chapter 6 > Lesson 6.2.4 > Problem6-141

6-141.

If $f(x)=x^4$ and $g(x)=3(x+2)$, find the value of each expression below.

1. $f(2)$

$16$

2. $g(2)$

3. $f(g(2))$

Substitute the output for $g(2)$ into $f(x)$.

$20,736$

4. $g(f(2))$

5. Are $f(x)$ and $g(x)$ inverses of each other? Justify your answer.

What happens to the original input when the two functions are inverses?