How do you simplify $1!$ ?

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Answer 1 · 2015-11-10T01:16:54

$1!$ is just $1$ .

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, $1! = 1$ .

How do you simplify 1! 1! ?