### Home > CCA2 > Chapter 5 > Lesson 5.2.1 > Problem 5-61

5-61.

Consider the function of *f*(*x*) =

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)) .

Substitute 7 for *x*.

Division by 0 is undefined. What *x*-value causes division by 0 for this function? *x* cannot have that value.

Substitute 3 for *x*.

*g*(3) = 11, therefore calculate *f*(11).