The slope of the tangent line:
The slope of the tangent line at is given by .
The function is
It is possible for two different functions to have the same derivative, it is because derivative of constant is .
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1ec76df660c5cb0f1700c9f5b86a9f9e.png\")
of the tangent line at ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=26ddf70799fd1a357eb92fb1c00c8987.png\")
is given by ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a0aac411cd7643f562b6728fcbca88a4.png\")
.![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fcd348ebf66f4047fc23f05f2c058874.png\")
.