关于无穷小量教学的一点建议

A Piece of Advice on Infinitesimal Teaching

关于无穷小量的教学建议使用下述定义较好：若无穷小量ｆ（ｘ），ｇ（ｘ）满足关系式Ｌ（Ｌ为正常数），则记作。

In infinitesimal teaching, it is better to adopt the following definidion of the capitalized 'O':'If infinitesimal f(x),g(x) accord with L(L is a positive constant),f(x)=O(g(x) )