求翻译：关于常系数非齐次微分方程初值问题的显示解，比较常用的是用古典微分方程和组合理论，由解的叠加原理，给出了初值问题的解法及解的表达式。文中用形式幂级数法，给出了一种 阶非齐次微分方程初值问题的解。是什么意思？

Display constant coefficient inhomogeneous differential equation initial value problem solution commonly used is the classical differential equations and portfolio theory, the expression of the solution and the solution of the initial value problem is given by the principle of superposition of solut

Non-alignment with regard to the long time factor differential equations of the initial value problem, the show is more commonly used in combination with classical theory, differential equations and the stacked by the operation, the initial value problem and the law of expression. In a formal power

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On non-homogeneous differential equations with constant coefficients display solutions of initial value problems, more common is the combination with the classical differential equations and theory, by the principle of superposition of solutions for, of solutions to initial value problems and soluti

About often the coefficient nonhomogenous differential equation initial-value problem demonstration solution, compared with commonly used is with the classical differential equation and the combinatorial theory, by the solution principle of superposition, has given the initial-value problem solution