Precalculus

Lecture 6: Inverse Functions

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An inverse function is a function that undoes another function. In its basic form, an inverse question answers the question "How did I get here?" If a function takes A to B, then the inverse takes B back to A. There's a little more to it than that, though. Not every function has an inverse.

The graphic that appears on Slides 4 and 9 comes from Section 1.7 of the Precalculus book by OpenStax (accessible for free). The graphic that appears in Slides 5 and 23 comes from Section 1.1 of the Precalculus book. Excerpts from Precalculus are allowed under the Creative Commons Attribution 4.0 International License.