關於factoria 的
0!----------------------點解會等於1既?
A.Maths
2007-11-15 2:50 am
回答 (1)
2007-11-15 3:06 am
✔ 最佳答案
As we have defined nC0 = 1,we need
(n!) / [0! (n-0)! ] = 1
So, 1 / 0! = 1
Thus, it is convenient to define 0! = 1
我諗 0! = 1 應該係因為 nC0 = 1
加入我地學既野未夠深，
可能去到 pure maths 先教 @@
不過 0! = nC0 = 1
參考: textbook
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