Differential Equation Undetermined Coefficients: y'' - 4y' + 3y = 20 cos x

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Differential Equation Undetermined Coefficients: y'' - 4y' + 3y = 20 cos x

#differential_equation #differentialequations #undeterminedcoefficients

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(4a+2b)sinx=0 what happenes to the sinx?

2x=0, we cant divide it by x.

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what happens if the right hand side was 20x*cos(2x), what would be the particular solution then? (before doing the derivatives)

jeffreysucuzhanay