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# HELP WITH THESE DIFFERENTIAL EQUATION?

please use the method of undetermined coefficients and show your steps with explanations

(1) Y"'+y'=4sinx +2x^2

(2) Y'''+y"+3y'-5y=5sin2x+10x^2-3x+7

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- Anonymous8 years ago
Hello jerome,

I have posted full solutions to your questions at one of the math help forums I help to moderate so that I may provide you with an easy to read explanation using LaTeX. I have used the annihilator method to determine the form of the particular solutions, and then applied the method of undetermined coefficients.

http://www.mathhelpboards.com/f52/jeromes-question...

Best Regards,

Mark.

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