Lösung 1.1:1b
Aus Online Mathematik Brückenkurs 2
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Version vom 09:57, 11. Mär. 2009
At those points where the graph of the function has a horizontal tangent (gradient equal to zero), the derivative is zero.
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| The graph of f(x) has horizontal tangents at x = -3 and x = 2 |
![[Image]](/wikis/2009/bridgecourse2-TU-Berlin/img_auth.php/metapost/d/5/f/d5f82ad1eaebf24b8eaed6abdc089a7b.png)
In the figure, we see that this happens when \displaystyle x=-3 and \displaystyle x=2\,.
