![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Observe the table :
\Horizontal line test:
\A function ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7638897a5bb9204998d7996637c7b50a.png\")
has an inverse ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=95580a6e5e13d71955ddcf26a364f83b.png\")
if and only if no horizontal line intersects its graph of the function at most one point.
The function has does not have unique value for different values of ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8da2268e35b6b6daab9c47f71c4c8bf4.png\")
, hence the function is not a one-to-one function.
Therefore the inverse of the function does not exist.
\![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The inverse of the function does not exist.