### Home > A2C > Chapter 9 > Lesson 9.1.1 > Problem 9-12

9-12.

A table can be used as a useful tool for finding some inverse functions. When the function has only one *x* in it, the function can be described with a sequence of operations, each applied to the previous result. Consider the following table for

1 | 2 | 3 | 4 | |

What : | subtracts 1 | multiplies by | adds |

Since the inverse must undo these operations, in the opposite order, the table for would look like the one below.

1 | 2 | 3 | 4 | |

What does : | subtracts | divides by | adds |

Copy and complete the following table for

if1

^{st}2

^{nd}3

^{rd}4

^{th}What

does to:adds

divides by

subtracts

What

does to:

Look at the table above.

Write the equations for

and.