Inverses

Introduction

Polynomial functions have inverses in special circumstances only. In an earlier unit, inverses of quadratics were discussed. Because the original function did not pass the horizontal line test, quadratics do not have inverses that are functions. Therefore, it makes sense that other even polynomial functions will not have inverses that are functions either. For example, the graph below looks like a parabola and will not have an inverse function.

Inverses