近几年各地调研、模考试卷中经常出现这样一类题,即给出含有导数式子的不等式,求解(或判断)相关不等式的问题.这类问题一般都涉及到抽象函数,往往比较抽象难以求解.如果能想到利用导数的运算法则构造新函数,然后再运用导数性质确定其单调性,那么此类问题就迎刃而解了.本文从2013年、2014年各地调研、模考试题中精选几例进行分析,供大家参考.例1若函数y=f(x)在R上可导且满 In recent years, there have been many problems in the research and exam papers in various places, ie, the problem of solving (or judging) the relevant inequalities with inequalities involving derivative formulas, which usually involve abstract functions and are often abstracted Difficult to solve.If we can think of using the algorithm of derivative to construct a new function, and then use the nature of the derivative to determine its monotonicity, then such problems will be solved.This article from 2013, 2014 around the survey, Example for analysis, for your reference .Example 1 If the function y = f (x) can be guided on R and full