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

43310 Posts

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

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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