### Home > A2C > Chapter 7 > Lesson 7.2.4 > Problem 7-141

7-141.

Find the inverse of each of the functions below. Write your answers in function notation.

Let

, switch theand thein the equation and solve for.See part (a).

Let

. Switchand. Multiply both sides of the equation byto remove the fraction. Distribute and then rewrite the equation so that all the

*y*-terms are on the left side and everything else is on the right side.Your equation should look like this:

. Factor the left side of the equation and divide both sides byto get *y*by itself.Graph the equation on a graphing calculator to see why this equation is its own inverse.

See part (a).