How do you evaluate factorials?

1 Answer
Alan P.
Feb 13, 2015

Factorials
Note that factorials are only defined for integers #>= 0#
The factorial of #n# is written #n!#

#n! = (n) xx (n-1) xx (n-2) xx ... xx (1)#

So, for example:
#5! = 5 xx 4 xx 3 xx 2 xx 1 = 120#

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