以导数为工具研究函数的各种性质,如极值、单调性、曲线在某点处的切线等,是近几年高考命题的重点内容之一,这也体现在知识的交汇处命题的指导思想,现就导数在几个方面的应用举例说明,以帮助同学们更好地掌握导数的应用． Derivatives as a tool to study the various properties of the function, such as extreme value, monotonous, the curve at a certain point of the tangent, is one of the key elements of college entrance examination proposition in recent years, which is also reflected in the guidance of the intersection of knowledge Ideas, now the derivative in several aspects of the application examples to help students better grasp of the application of derivatives.