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近几年的高考中,关于参数的取值范围问题几乎每年都有考题,由此带动了一大批参数取值范围问题,能解答出参数的取值范围问题是大多考生所热切期盼的.它的总体思路是建立关于参数的不等关系,化多参数问题为单参数问题,最后求出关于参数的不等式的解集便是参数的取值范围,但难点在于如何建立参数的不等关系.本文想从以下四个方面去探讨,供参考.
In recent college entrance examinations, questions about the range of values of parameters have been given questions almost every year. This has led to a large number of parameter range problems. The range of parameters that can be answered is a question that most candidates are eagerly looking forward to. Its general idea is to establish the unequal relation of parameters, to solve the multi-parameter problem as a single-parameter problem, and finally to find the solution set of the inequality of parameters is the range of parameters, but the difficulty lies in how to establish the inequality of parameters. This article wants to explore from the following four aspects for reference.