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#1 2011-04-13 10:21:00

Cosmopolite
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Undetermined coefficient.

I had this equation on my test, yesterday and I just couldn't do it. Hopefully someone in here will do better than me.

Y'''+Y' = X^2.

I was only able to solve the homogenous equation Y'''+Y' = 0.
My answer was y = C1+C2*cos x+ C3 *sinx.

 

#2 2011-04-13 14:39:45

gAr
Star Member

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Re: Undetermined coefficient.

Hi Cosmopolite,



"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
 

#3 2011-04-18 23:45:07

Cosmopolite
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Re: Undetermined coefficient.

Thank you.

 

#4 2011-04-18 23:46:44

gAr
Star Member

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Re: Undetermined coefficient.

You're welcome.


"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
 

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