let me start by saying that I'll be asking a lot of questions here soon as I'm preparing for a Calc BC AP test and I'm using practice exams to help.(adsbygoogle = window.adsbygoogle || []).push({});

On the first practice exam, the first question:

http://img390.imageshack.us/img390/9390/q1graph5bt.png [Broken]

Find the derivative of [tex]f^{-1}(x)[/tex] at [tex]x=-.5[/tex].

Check my logic:

Since (1.5,.5) is on the original graph, (.5, 1.5) is on the inverse graph. Since the derivative of F at 1.5 is -.5, the answer is the recipricol, -2.

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# Inverse function derivative

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