一类二阶、三阶变系数线性微分方程的积分法

INTEGRAL SOLUTIONS TO A CLASS OF SECOND AND THIRD ORDER DIFFEREN-TIAL EQUATIONS WITH VARIABLE COFFI-CIENTS

本文给出了二阶、三阶变系数微分方程存在积分因子μ(x)的充要条件,并给出这一类二阶、三阶微分方程的通解表达式。

This paper gives N&S conditions to the existence of a integrating factor μ(x) of a class of differen-tial equations and the general solutions to them.