This paper introduces three methods to find solutions to second-order constant coefficient inhomogenous linear differential equation, namely multinomial method, ascending order method and integration method.

• 摘要求二阶常系数线性微分方程特解的方法虽然有许多种，但用多项式法、阶数上升法、积分法求二阶常系数线性微分方程的特解是比较简便的。