![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The function is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0be55348a1a9cc54a558649fcae6fb7b.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=0be55348a1a9cc54a558649fcae6fb7b.png\")
and the horizontal line is .
![\"\"](\"/userfiles/50-266-62.gif\")
\
The horizointal line touches the graph of the function at more than .
Hence 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.