![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Observe the graph :
\The graph of the function is decreasing, increasing again decreasing, increasing.
\So the derivative of the function is negitive, positive again negitive, positive.
\Clearly the graph has a 3 critical points at ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=255c468abbc6d4d02161246dc7ef5a60.png\")
and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b4f37bed6b9c992b7f841f1150be39ca.png\")
.
Plot the graph with above conditions.
\![\"\"](\"/userfiles/187-62.gif\")
The derivative of the graph of the function is
\.