Basing on a partition of region d, we generalize the differential mean-value theorems for analytic functions and conjugate analytic functions to a high order case.
以分割区域d为基础将解析函数与共轭解析函数的微分中值定理推广到高阶形式。
The criterion extreme value of binary function for first partial derivative is given by means of the mean value theorem. The two theorems are obtained.
以中值定理为工具，给出了利用一阶偏导数判定二元函数极值的方法。
The criterion extreme value of binary function for first partial derivative is given by means of the mean value theorem. The two theorems are obtained.
以中值定理为工具，给出了利用一阶偏导数判定二元函数极值的方法。
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