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形如z=f(x,y)的函数称为二元函数,其最值问题是高中数学的一大难点,近年来高考试题中屡有考察.求解二元函数的最值,涉及到函数、不等式、线性规划、解析几何、向量等高中数学重点知识,更体现了函数思想、化归转化思想、数形结合思想和分类讨论思想等若干核心数学思想的应用.所以二元函数问题最值的求解,是函数部分的重点.
The function of shape such as z = f (x, y) is called the binary function, and its most value problem is a major difficulty in high school mathematics. In recent years, it has been frequently examined in college entrance examination questions. , Inequality, Linear Programming, Analytic Geometry, Vectors and other high school mathematical knowledge, but also reflects the application of several core mathematical ideas, such as functional thinking, conversion to conversion theory, mathematical combination theory and classification thinking, etc. Therefore, The solution is the focus of the function section.