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二次函数(特别是含参数的二次函数)在某区间上的最值,是高中数学中经常遇到的问题,在各类考试题中屡见不鲜。引起二次函数最值变化的是对称轴和区间,本文根据对称轴和区间的关系归类分析。
The most frequent value of a quadratic function (especially a quadratic function with parameters) in a certain range is a problem often encountered in high school mathematics. It is not uncommon in various examination questions. The symmetry axis and interval are the symmetry axes of the quadratic function. This paper classifies the symmetry axis and the interval.