在各级各类数学考试(尤其是高考数学试题)中,压轴题往往有一定难度,不少考生感到困难.本文以导数压轴题为例谈谈数学解题中等价转化即转化化归的数学思想方法的运用.例1已知函数f(x)=ln x-a(x-1)/x+1.(1)若函数f(x)在(0,+∞)上单调递增,求a的取值范围; In all kinds of mathematics exams at all levels (especially mathematics exam entrance), the acupoints often have a certain degree of difficulty, many candidates feel difficult.This article takes the derivative finale as an example to talk about the mathematical solution of the problem of equivalent transformation, that is, the conversion of mathematics Example 1 The function f (x) = ln xa (x-1) / x + 1. (1) If the function f (x) increases monotonically on (0, + ∞) Ranges;