【摘要】 本文关注常数变易法在n阶线性非齐次常微分方程求解中的特性，且特别针对二阶微分方程.定理1给出了非齐次方程通解与该任意常数无关的充分条件，通过两个典型算例验证了定理1中的结论，分析了不同约束条件对通解的影响.更多还原

【Abstract】 The method of variation of constants for solving n^th order, especially for the 2^nd order, linear nonhomogeneous ODE is discussed. Theorem 1 presents a sufficient condition for determining the general solution independent of the arbitrary constants. With two classical numerical examples, we verify the result of Theorem 1 and explore further the effects of different constrains to the general solution.更多还原