let f(x,y)=x^2y(2-x+y^2)-4x^2(1+x+y)^7+x^3y^2(1-3x-y)^8 find the coefficient of x^5y^3

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Colby Messinger answered 1 year ago

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y"-3y'+2y=4t-8 , y(0)=2 , y'(0)=7 y(t)=?

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