How do you simplify #1! #?

1 Answer
Katie Lau
Nov 10, 2015

#1!# is just #1#.

Explanation:

A factorial represents the product of that number and the numbers below it until 1. To clarify:

#5! = 5 * 4 * 3 * 2* 1#

#11! = 11 * 10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1#

In this case, #1! = 1#.

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