Find the general solution of the differential equation. y (4) + 2y"+y = 9+ cos(4t). NOTE: Use C1, C2, C3 and c4 for arbitrary constants. y(t) = C₁ cos(t) + c₂t cos(t) + c3 sin(t) + c₁t sin(t) + 9 + cos(3 t) 1 64 #3 X Edit

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