Study of extrme value of multivariatefunction by matrix;
多元函数的教学是高等数学教学中的一个难点。
2
According to unary function limit and multivariatefunction limit of mathematical Analysis, the validity of the index Vnew is proved in theory.
并根据数学分析中一元函数和多元函数的极限的相关知识，在理论上证明了该指标的有效性。
3
In this paper we give a method of test, which makes use of the gradient, to verify the extreme value of multivariatefunction, and give some typical examples.