导数是我们解题的一个工具,因此近几年高考对导数应用的考查无论在深度上还是广度上都在不断地加深和拓宽,并且它常以“崭新”的面貌闪亮登场,给人“乱花渐欲迷人眼”的感觉,常常让考生找不到解题的思路.笔者结合最近的两道模拟试题来揭示其本质,让考生更好地掌握这种类型来备考. Derivatives is a tool we solve the problem, so in recent years, college entrance examination on the application of the test in terms of both depth and breadth are constantly deepening and broadening, and it often “new ” look shiny debut, to People “chaos flowers for the eyes charming ” feeling, often let the examinee can not find the problem-solving ideas.The author combines the recent two simulation questions to reveal its essence, so that candidates better grasp of this type to test.