What is meant by #n!# in a mathematical expression?

1 Answer
Wataru
Oct 18, 2014

Definition (Factorials)

#0! =1#

#n! =n cdot (n-1)cdot(n-2)cdotcdotscdot2cdot1# for all natural number #n#.

For example,

#5! = 5cdot4cdot3cdot2cdot1=120#

I hope that this was helpful.

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