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求函数最值不仅涉及函数领域,还会延伸到向量、三角函数、解析几何、立体几何等各个领域,因此,其在高中数学中所占地位不言而喻.如何求解函数最值问题,值得我们不断地进行总结和反思.本文就求函数最值问题中的几种常见方法予以小结.配方、换元法初中已经掌握了配方法,配方法是根据二次函数的图象特征,把函数整理成二次函数的顶点式,从而找到函数最值.但在解题过程中有时需先换元得到二次函数.
Find the value of the function not only involves the functional area, but also extends to the vector, trigonometry, analytic geometry, solid geometry and other fields, therefore, its position in high school mathematics is self-evident .How to solve the function of the most value problems, it is worth We continue to summarize and reflect on.This paper summarizes several common methods in finding the most value of the function.Formulation and the method of commutation method have already mastered the matching method in the junior middle school.The method is based on the image features of the quadratic function, Finishing the vertices of the quadratic function, so as to find the value of the function.But in the process of solving the problem, we need to get the quadratic function first.