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.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Inverse function derivative

**Physics Forums | Science Articles, Homework Help, Discussion**