比较函数值大小的问题是函数中常考题型之一,其方法多种多样,其中以函数单调性为主,而导数是判断函数单调性的常用工具,那么以导数为背景的比较函数值大小的问题应运而生,一般作为选择题的压轴题型,学生往往失分,下面就以2012年的高考模拟题为例浅谈此类问题的解法。一、直接法当题目条件告诉导函数在给定区 Comparing the size of the function value is one of the most frequently used test questions in the function. There are many kinds of methods, of which the monotonicity is the main function, and the derivative is a common tool to judge the monotonicity of the function. The problem arises at the historic moment, generally as the finale of multiple choice questions, students often lose points, the following 2012 college entrance examination simulation questions as an example to talk about such solutions. First, the direct method of the title condition tells the derivative function in a given area