![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Observe the graph.
\The function is periodic function with repeat local extrema therefore the derivative of the periodic function is
\periodic function with zeros at local extrema.
\Assume the function is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a83780f53751b18e75ac46ef4480dd32.png\")
.
The rate of change of the function is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fb9d74cff2b186735bb1b3ef3b5f3bb6.png\")
.
Hence derivative of the function is suitable with the graph ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c8328feb305bff597b7a55d58558fc9c.png\")
.
Graph ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c8328feb305bff597b7a55d58558fc9c.png\")
is the correct choice.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
Graph is the correct choice.