### Home > AC > Chapter 13 > Lesson 13.IF2-S > Problem 6-36

6-36.

Consider the function

. Homework Help ✎What is

*f*(7)?What is the domain of

*f*(*x*)?If

*g*(*x*) = 2*x*+ 5, what is*g*(3)?Now use the output of

*g*(3) as the input for*f*to calculate*f*(*g*(3)).

Undefined

*x* ≠ 7

11

Substitute the value of *g*(3) for *x* in *f*(*x*).