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函数问题的解决大多依赖于图象的分析,而准确地分析图象往往需要借助于导数这个工具.其中通过对参数的讨论来分析导数的正负是难点,如何确定参数讨论的范围,也就是怎样对参数进行分类是解题的关键.参数讨论范围的界点是在动态探索过程中逐步确定的,解题时应该把握讨论的层次,逐步确定参数讨论的界点,确定参数讨论的范围,不可一蹴而就,也不能手忙脚乱,下面以近两年高考题为例分析说明.1分层,实例探究
The solution to the function problem mostly depends on the image analysis, and the accurate analysis of the image often requires the aid of the derivative tool, in which it is difficult to analyze the positive and negative of the derivative by discussing the parameter, and how to determine the range of parameter discussion How to classify the parameters is the key to solve the problem.The parameter boundary of the scope of the discussion is gradually determined in the process of dynamic exploration, solving the problem should grasp the level of discussion, and gradually determine the parameters of the discussion point to determine the parameters of the discussion, Can not accomplish overnight, can not be in a hurry, the following two years of college entrance examination questions as an example to illustrate .1 stratification, case study