desolve y'=(x+y)^2
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05-01-2015, 04:48 PM
Post: #5
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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. 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 ∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C - DM42, DM41X - WP34s Prime Soft. Lib |
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