dªy Using the reduction of order method, find the general solution of the differential equation dx4 A. None of these. B. 13 3 13 4 1 ·x + 5x y=x+x²_ - - 150 120 125 C. 13 3 13 4 5x - - y = C₁+C₁₂x+c ₂₁x². 390 312 125 where C1, C2, C3, C4 are arbitrary constants. D. 5x --- y = C₁ + ₂x+c₁₂₁²_ 13 3 13 4 120 ·x + e 150 125 where C1, C2, C3, C4 are arbitrary constants. OE 13 13 5x y = C₁ + C₂x+c ₂₁x² +- -x +- e 150 120 125 ·x + CA e d³y dx3 5. = 13x

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