The general solution of a kind second order equation is given. 摘要給出一類二階變係數線性微分方程的通解。
We discuss the stability of a kind of neutral delayed linear differential equation, and obtain the stability criterion of this equation. 摘要討論了一類中立型線性微分方程的穩定性,得到其零點穩定的充分判別準則。