The general solution of the fourth-order differential equation y() + y" +y"-0 is: y=c_1 +c_2 x+e^((-x)/2) (c_3 cos((V3/2) x)+c_4 sin((v3/2) x) y=c_1 +c_2 x+e^((-x)/2) (c_3 cos((V3) x)+c_4 sin((v3) x) y=c_1 +c_2 x+e^((x)/2) (c_3 cos((v3/2)

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