导数的引入无疑为我们研究函数及其对应的曲线带来了极大的方便,导数的相关知识在高考中的地位也日益突出.学生在解相关题目时,由于概念不清或对基础知识理解不全面而致误的情形时常发生.本文对利用导数研究曲线的切线时应注意的几个问题进行了总结,仅供参考. Derivatives undoubtedly bring great convenience to our study of the function and its corresponding curve, the derivative of the relevant knowledge in the college entrance examination has become increasingly prominent position.Students in the solution of related topics, due to unclear concepts or understanding of basic knowledge Incomplete and error-prone situations occur frequently.This paper summarizes several issues that should be paid attention to when using the tangent of the derivative study curve, and is for reference only.