# Invers Function

## Basic Concept

Inverse function $$f$$ is reverse function, denote as $$f^{-1}$$. If a function $$f$$ is mapping x to y, then $$f^{-1}$$ is mapping y to x,

To find the invers function of $$y = f(x)$$, we need to determine $$x = f(y)$$.

A function has an inverse if the function is a one-one function. One-one function is there is only one value of element of domain that mapped to one value of range, and vice versa.

Domain of $$f^{-1}$$ is same with range of $$f$$

Range of $$f^{-1}$$ is same with domain of $$f$$