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I can't do these diff. eqns.

 
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Dec14-03, 09:02 AM   #1
 

I can't do these diff. eqns.


Hi,
I have been trying to solve the following differential equations I was stuck with them. I will appreciate any help from you;
1- 3 y' +3x/y =2(xy)^4
I have tried Bernoulli but I could not get a standard form.
2- x' -2 x y = y exp (-3y^2)[x exp(-y^2)+ 3(x exp(-y^2))^2]
I have tried here the substitution x exp(-y^2)= u , but I could not also find the solution.

Can any one do it?

hhegab
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Dec15-03, 02:30 PM   #2
 
The equation doesnt seems authentic to me.I will be looking for someone to solve it
Dec15-03, 04:01 PM   #3
 
thank you in advance man!

Hatim
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