题目

英语翻译
目前,我们在科学生产中经常要对函数的极值进行讨论,我们都很熟知的初等方法只能解决有限元的函数,面对许多函数如果我们用初等方法解决将会变得非常困难甚至无法解决,于是,本文从一下几方面作了介绍：二元函数极值的定义及存在条件、二元函数极值的一阶偏导判别法；条件极值的求解方法及应用；n元函数极值的定义及存在条件及存在问题、n元函数的累次极值、向量法求解一类多元函数极值.通过以上方法的介绍,旨在为以后的学习和实际工作带给一定的方便.

提问时间：2020-05-21

答案

At present, we in the scientific production often extreme value of function are discussed, but we are very familiar with the elementary method to solve the function of finite element, in the face of many function if we use the elementary method to solve will become very hard or even impossible to solve, so, this paper introduced from about several aspects: definition two extreme value of binary function and the presence of a two order conditions, extreme value of binary function partial derivative method; method of conditional extreme value and application; n value of binary function definition and existing conditions and problems, n function repeated extreme, vector method for solving a class of multivariate function extreme value. Through the above method is introduced, aiming for future study and work to bring certain convenience.