Learn how to find the formula of the inverse function of a given function. For example, find the inverse of f (x)=3x+2.

Learn what the inverse of a function is, and how to evaluate inverses of functions that are given in tables or graphs.

Sal explains what inverse functions are. Then he explains how to algebraically find the inverse of a function and looks at the graphical relationship between inverse functions. Created by Sal …

Intro to inverse functions Inputs & outputs of inverse functions Graphing the inverse of a linear function Finding inverse functions: linear

In the first inverse function video, I talked about how a function and their inverse-- they are the reflection over the line y equals x. So where's the line y equals x here?

By starting out with a function, you know it passes the vertical line test by definition. However, for its inverse to be a function, it also has to pass the horizontal line test to insure the one-to-one …

Not all functions have inverses. Those who do are called "invertible." Learn how we can tell whether a function is invertible or not. Inverse functions, in the most general sense, are …

This explanation is so much clearer than the intro to inverse functions. The key here is the tables, and that the roles of x and y are reversed. That explains why the inverse graph does not …

Not all functions have an inverse! For example, those where multiple x's produce the same y don't. This is because, given a y, we cannot pin-point which single x it came from. If f (x1) = y …

了解反函数是什么, 以及如何用表或图求反函数的值。