an auxiliary function

Mean value theorem and Taylor formula are generally proofed by constructing an auxiliary function.

中 值 定理 是研究函数特性的一个有力工具。

Its key proof is to construct an auxiliary function, which is used by Roll's theorem to reach a conclusion of Lagrange's theorem.

其证明方法关键在于构造一个辅助函数，再应用罗尔中值定理推出拉格朗日中值定理的结论。

Through these simple, but an important detail perfect, can greatly enhance product existing function, and auxiliary enterprise to manage its own equipment, in order to obtain higher better returns.

通过这些简单却又重要的细节完善，可以大大加强产品现有功能，并辅助企业管理好自己的设备，以期获得更高更好的回报。