### Home > A2C > Chapter 7 > Lesson 7.2.3 > Problem 7-132

7-132.

Which values of *x* will cause the square root expression to be undefined?

If *f*(*x*) = *y*, then switch the *x* and the *y* in *f*(*x*). Solve for *y*.

Switch the domain and range of *f*(*x*).

Substitute the equation *g*(*x*) that you found in part (b) for *x* in *f*(*x*).

Simplify.

See part (d). What relationship do *f*(*x*) and *g*(*x*) have with each other? (What is the relationship between two inverses?)