Any time a built-in primitive function is available, that will be a better design alternative than creating custom code.

如果内置基本函数在任何时间都可用，则与创建自定义代码相比，它是较好的设计备选方案。

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It defines n-ple derivative, n-ary absolutely continuous function, generalized n-ple primitive function and Newton n-ple integral.

定义了n重导数，n元绝对连续函数，广义n重原函数及牛顿n重积分。

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This paper analyses several characters of derivative function, presents effective methods to discuss existential conditions of primitive function and gives number of facilitated conclusions.

本文通过对导函数若干性质的分析，采用简洁的方法，对原函数存在的条件进行了探讨，给出了几个便于使用的结论．。

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This paper analyses several characters of derivative function, presents effective methods to discuss existential conditions of primitive function and gives number of facilitated conclusions.

本文通过对导函数若干性质的分析，采用简洁的方法，对原函数存在的条件进行了探讨，给出了几个便于使用的结论．。

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