By using Taylor's formula, the article deduces the sufficient condition of the existent extreme value and the necessary condition of the inexistent extreme value of trinary function.
通利用泰勒公式推导出判断三元函数极值存在充分条件和极值存在必要条件。
By using Taylor's formula, the article deduces the sufficient condition of the existent extreme value and the necessary condition of the inexistent extreme value of trinary function.
通利用泰勒公式推导出判断三元函数极值存在充分条件和极值存在必要条件。
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