Moser與費吳琛於1989年提出一個新的Robb ins-Monro隨機近似過程，此篇論文證明了其充 分存在定理，在此一新的隨機近似過程中，對一遞增的迴歸式而言，任何根均可用所估計的兩 個根的線性組合來表示，本文亦舉例證明此充分存在定理與線性組合之特性。

A sufficient condition for the new Robbins-Monro sequential procedure proposed by Moser and Fei in 1989 is proved. Any root for the increasing regression function used in this new procedure can be presented as a linear combination of the roots estimated. Some examples are given to expound the sufficient condition and the linear combination.