11 設微分方程式 x′′(t) + 4x(t) = sin 3t 的解 x(t) 經過拉普拉斯(Laplace)轉換後為 ,下 列何者為正確之初始條件? (A)x(0) = 1, x'(0) = 0 (B)x(0) = 0, x'(0) = 0 (C)x(0) = 0, x'(0) = ‒1 (D)x(0) = 0, x'(0) = 1