考点一利用导数研究曲线的切线考情聚焦:1.利用导数研究曲线y=f(x)的切线是导数的重要应用,为今年各省市高考命题的热点.2.常与函数的图象、性质及解析几何知识交汇命题,多以选择、填空题或以解答题中关键一步的形式出现,属简单题. Test points using the derivative of the tangent of the study curve Focus: 1. Using the derivative of the study curve y = f (x) of the tangent is an important application of derivatives for the provinces and cities this year, the hot topic proposition .2 often associated with the function of the image, Nature and analytic geometry knowledge convergence proposition, and more to choose, fill in the blank questions or to answer questions in the form of a key step, is a simple question.