![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The function is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5823d9829b5315f1371d7c1a48020edd.png\")
.
Consider the horizontal line is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6aac2b8aa96b8a5391692b8bb1e7735a.png\")
.
Graph:
\Graph the function for ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5a5a57e2d47bdbe29818782427dce9df.png\")
and the horizontal line is .
![\"\"](\"/userfiles/50-266-61.gif\")
\
The horizointal line touches the graph of the function at more than once.
Hnece the function does not pass the horizontal line test.
\Therefore the function is not an one-to-one function.
\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.
\\