在探究函数的特征(如求函数的极值和判断单调性)时,导数的引进无疑给这方面的学习与研究注入了新的活力.但同时由于概念不清而致误的情形也时常发生,不少参考资料上有时也难免“大意失荆州”而出现错误.本文准备对某些参考书上出现的几类误解进行剖析,以期引起大家的重视. 一、把“驻点”等同于“极值点” When exploring the features of a function (such as finding the extremum of a function and judging monotonicity), the introduction of a derivative undoubtedly brings new vitality to the study and research in this area. But at the same time, misjudgments often occur due to unclear concepts. , Many references are sometimes inevitably “failed to miss Jingzhou” and there are mistakes. This article is prepared to analyze certain types of misunderstandings that appear in some reference books in order to arouse everyone’s attention. First, the “stationary point” is equivalent to “ Extreme point”