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desolve y'=(x+y)^2
05-01-2015, 04:48 PM
Post: #5
RE: desolve y'=(x+y)^2
(05-01-2015 04:41 PM)Arno K Wrote:  Funny, yesterday I had a similar Problem to solve, nearly the same diffeq, clearly that didn't work. So I did the Substitution u=x+y by hand, after that I entered the new equation in desolve and it worked. Itried then mathexplorer on my mobile, it didn't solve either equation. I think that this little trick can easily be implemented to the CAS.
Hth Arno

yes, I hope indeed that the substitution could be really implementable to the CAS as well.
I've tried a lot of ODE and Prime handles them well, except few types (i.e the Riccati type); this is a common form and it would be important that the Prime (and CAS) could solve it...

Another problematic form is y'= f(y/x), almost in the tries I did...

Salvo

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Messages In This Thread
desolve y'=(x+y)^2 - salvomic - 05-01-2015, 02:45 PM
RE: desolve y'=(x+y)^2 - Tugdual - 05-01-2015, 04:11 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-01-2015, 04:14 PM
RE: desolve y'=(x+y)^2 - Arno K - 05-01-2015, 04:41 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-01-2015 04:48 PM
RE: desolve y'=(x+y)^2 - Tugdual - 05-01-2015, 07:06 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-01-2015, 07:16 PM
RE: desolve y'=(x+y)^2 - lrdheat - 05-01-2015, 07:56 PM
RE: desolve y'=(x+y)^2 - lrdheat - 05-01-2015, 07:57 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-01-2015, 08:06 PM
RE: desolve y'=(x+y)^2 - Tugdual - 05-01-2015, 08:26 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-01-2015, 08:34 PM
RE: desolve y'=(x+y)^2 - parisse - 05-02-2015, 05:30 AM
RE: desolve y'=(x+y)^2 - salvomic - 05-02-2015, 07:00 AM
RE: desolve y'=(x+y)^2 - salvomic - 05-02-2015, 09:34 PM
RE: desolve y'=(x+y)^2 - parisse - 05-02-2015, 10:50 AM
RE: desolve y'=(x+y)^2 - salvomic - 05-02-2015, 12:36 PM
RE: desolve y'=(x+y)^2 - parisse - 05-02-2015, 12:43 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-02-2015, 12:49 PM
RE: desolve y'=(x+y)^2 - parisse - 05-02-2015, 06:15 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-02-2015, 07:32 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-02-2015, 04:07 PM
RE: desolve y'=(x+y)^2 - Tugdual - 05-02-2015, 04:45 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-02-2015, 04:59 PM
RE: desolve y'=(x+y)^2 - Tugdual - 05-02-2015, 05:21 PM
RE: desolve y'=(x+y)^2 - salvomic - 05-02-2015, 05:23 PM
RE: desolve y'=(x+y)^2 - parisse - 05-03-2015, 06:08 AM
RE: desolve y'=(x+y)^2 - salvomic - 05-03-2015, 07:48 AM
RE: desolve y'=(x+y)^2 - parisse - 05-04-2015, 07:15 AM
RE: desolve y'=(x+y)^2 - salvomic - 05-04-2015, 08:34 AM
RE: desolve y'=(x+y)^2 - salvomic - 05-11-2015, 09:30 PM



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