# Im having trouble finding the second derivative of this equation

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• April 24th 2010, 08:57 AM
adam_leeds
Im having trouble finding the second derivative of this equation
http://i43.tinypic.com/2ekj2n8.jpg

find the second derivative (0)

I get two different answer, one where i expand the brackets out, and one where i just make 1-q = p
• April 24th 2010, 09:24 AM
Ruun
$\left( \frac{1}{f} \right) ' = - \left( \frac{f'}{f^2} \right)$

Let $f = 1 - qe^{it}$
• April 24th 2010, 12:21 PM
HallsofIvy
What reason would you have for setting 1- q= p?
• April 25th 2010, 01:34 AM
adam_leeds
Quote:

Originally Posted by HallsofIvy
What reason would you have for setting 1- q= p?

its a stats module, probabiliity