Last edited by mr fantastic; Oct 21st 2010 at 04:49 AM.
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It's Bernoulli, with standard form
how does from we get z' and y' we only have dz and dy here???
in order to get y' we need to have dy/dx we dont have it here.
then after solving by parts i get
what to do now?
Last edited by transgalactic; Oct 20th 2010 at 11:28 PM.
First off, if you let then .
ok i missed that -4 in the defferentiation
what about my questions
Well, you need to transform the DE which is in terms of into a DE in terms of .
You have .
By the chain rule, .
So and thus .
Substituting everything into the DE .
This is now first order linear, which you can solve using an integrating factor.
i got a similiar lenear differential equation
and i solved it by multiplying in exponet etc
and it doesnt come out
Your integrating factor is .
So multiplying through by the integrating factor gives .
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