![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Observe the graph: \ \
\The intervals are ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8fe3de3bd28c66a26eead5ac3eaec056.png\")
,![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4699210c1bc3949002c19cad9afaba2d.png\")
and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=579e9103b56ec38b6976643ecbbaee39.png\")
. \ \
Consider the horizontal line ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c3f40df3b6ee26c4ed5b179d6afd8b20.png\")
on the graph.
Horizontal line ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c3f40df3b6ee26c4ed5b179d6afd8b20.png\")
touches the graph more than once.
The function does not passes the horizontal test, hence the function is not an one-to-one function.
\Therefore the inverse of the function does not exist.
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The inverse of the function does not exist.