The function is
(Take LHS)
(Apply the chain rule)
(The power rule:)
(Simplify)
Therefore .
So, it is true.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"fraction](\"http://www.wiris.com/portal/plugins/demo/fckeditor/php/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=132345326b5554ae7d8a032d993fa054.png\")
![\"fraction](\"http://www.wiris.com/portal/plugins/demo/fckeditor/php/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c10de70146901cfeb195a604d67fb252.png\")
(Take LHS)![\"minus](\"http://www.wiris.com/portal/plugins/demo/fckeditor/php/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7803ee751e4f5dd10d0670e40cafa7a6.png\")
(Apply the chain rule)![\"minus](\"http://www.wiris.com/portal/plugins/demo/fckeditor/php/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e9aa0808624772f8a1580dc0d67b4fe4.png\")
(The power rule:![\"fraction](\"http://www.wiris.com/portal/plugins/demo/fckeditor/php/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c255ce4b3585e127a1788ea9fddc38a6.png\")
)![\"minus](\"http://www.wiris.com/portal/plugins/demo/fckeditor/php/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=61f9239b85f191377965d6242f574e6b.png\")
(Simplify)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
.