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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.
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.
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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