[理工] 离散_p3-18范例5

楼主: fmtshk (fmtshk)   2019-06-19 14:04:27
https://i.imgur.com/ksCb5Ds.jpg
请问这题它把数列想成物品时
为何是前B类皆有n个物品,而不是分别有n^1,n^2,...,n^m个?
https://i.imgur.com/Ressdeo.jpg

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