3. y" +4y = 0; yıi =cos 2x, y2 = sin 2x; y(0) = 3, y'(0) =8 4. y" + 25y = 0; yı = cos 5x, y2 = sin 5x; y(0) = 10, y'(0) = -10 5. y" – 3y' +2y = 0; y1 = e*, y2 = e2x; y(0) = 1, y'(0) = 0 %3D %3D %3D

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