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Quote:
Since N! = (N)(N-1)(N-2)...(3)(2)(1) And (N-1)! = (N-1)(N-2)...(3)(2)(1) Then N! = (N)(N-1)! If N = 1 Then 1! = (1)(0)! = 1 So, 0! = 1 ! = ()()!
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