1 y" + 3y = 18x², y(0) = -3, (0) = 0 2 y + 4y + 4y = e- 2 sin 2x, y(0) = 1. (0) = -1.5 3 Find the steady-state current in the RLC-circuit in Fig R= 40, L = 0.5 H, C = 0.1 F, E = 500 sin 2/V E(t) = E sin cot
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