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Old 2008-09-24, 21:06   #4
Kevin
 
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Aug 2002
Ann Arbor, MI

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The method ewmayer used is called implicit differentiation, if you haven't seen it before.

http://en.wikipedia.org/wiki/Implici...ifferentiation

Also, ewmayer screwed up a few derivatives in the final expression =P. It should read

1 = ( -2*dV/V^3)*(V-c) + (b + 1/V^2)*(dV)
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