(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

y''' - y = e^x + 7

2. Relevant equations

3. The attempt at a solution

I used y=Ae^x +B and then I multiplied by x^2 because y_c = c1 + c2 e^x + c3 e^(-x)

the c1 and c2 e^x value repeat. Therefore I got: y= Ax^2 e^x + Bx^2

I got A = 0 and A=1 which is wrong and B=0

Any hints? do I need to add a Cx e^x and then multiply by x^2?

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# Homework Help: Find particular solution third order Diff Eq

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