### Home > PC > Chapter 1 > Lesson 1.4.2 > Problem 1-149

1-149.

Given

*f*(*x*) =. Homework Help ✎ Find

*f*^{−1}(*x*).Sketch

*f*(*x*) and*f*^{−}^{1}(*x*) on the same set of axes.Find

*f*^{−}^{1}(*f*(6)) and*f*(*f*^{−1}(2)). What do you notice?

Change *f*(*x*) to *y*.

Switch every *x* to *y* and every *y* to *x*.

Solve for *y*.

Composing *f* and *f*^{ −1} in either order returns the original number.