What I showed you at the beginning, and then erased, basically justifies how to take the derivative of a reciprocalfunction.
最开始我讲过了，如何对倒数函数求导。
2
Researches are made on the definition and nature of reciprocalfunction, and drawing method of reciprocal dot are given.
对反商函数的定义、性质进行了研究，并给出了倒数点的绘制方法。
3
The reciprocalfunction of the factors constituting value decides the production of value, promote the changes of value, which is the basic subject of the (philosophical) law of value.