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#2 Exercises » Undetermined coefficient. » 2011-04-12 12:21:00

Cosmopolite
Replies: 3

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.

#4 Re: Help Me ! » Differentiation Problem » 2011-02-06 07:29:52

Hey bobbym

I read your answer but I don't understand the part where you differentiate with respect to W. Would you explain to me why you did that? Thank you.

#6 Re: Help Me ! » Very difficult Integral... Please Help » 2011-01-04 20:58:53

It was me that made the precedent post. I redid the work correctly using e^(-3x) as my u and cos(bx) as my dv and I got the same answer than you guys.

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