导函数不等式解集求解方法

Guidance Function Inequality Solution Set Method

近年高考命题趋势表明,导数已经成为新教材高考命题的热点。导数作为一种重要的解题工具在考察高中数学的函数的单调性及其延伸问题有其独特的作用,而函数的单调性是研究函数的性质如极值、最值(值域)、零点等问题的先决条件,故判断导函数的符号是导数工具作用能否发挥的关键一步。文章结合实际教学经验例谈导函数不等式的求解方法。

In recent years, college entrance examination proposition trend shows that the derivative has become a hot textbook proposition. Derivatives as an important problem-solving tool have unique functions in examining the monotonicity and extension of high school mathematics functions. The monotonicity of the function is to study the properties of the function such as extreme value, maximum value（range）, zero point and other issues preconditions, so to determine the function of the derivative of the derivative function of the key tool can play a key step. The article combined with the actual teaching experience to talk about the inequality of the derivative function.