Using two mathematic models, a new demonstrating method is given out for the repeated combination formula.

应用了这两个数学模型，对重复组合公式给出了一个新的证法。

youdao

Using two mathematic models, a new demonstrating method is given out for the repeated combination formula.

应用了这两个数学模型，对重复组合公式给出了一个新的证法。

youdao