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不等式恒成立求参数范围问题在近几年高考以及各类考试中经常出现,且形式灵活,思维性强,知识交汇点多,往往与函数、数列、方程、几何有机结合起来,难度系数较大.归纳总结这类问题的求解策略,有助于提高学生的分析和解决问题的能力.本文结合示例谈谈这类问题的求解策略.1变量分离法——目标明确将所求变量与其他变量分离开,通过研究式中另外一个变量的已知范围来确定所求变量的范
Inequality Constitute the parameters to establish the scope of the problem In recent years, the college entrance examination and various examinations often occur, and the form of flexible, strong thinking, knowledge intersection and more often with the function, sequence, equation, geometry, organism, difficulty coefficient larger Summarizing the solving strategies of these kinds of problems can help students to improve their ability of analyzing and solving problems.This paper discusses the solution strategies of such problems with examples.1 Variable separation method - Separated from each other by studying the scope of the known variable to determine the variable