Question

(n - 1)!, where n = 4

Answer 1

6

Explanation:

Original Equation

(n-1)!

Plug in 4 as n

(4-1)!

Subtract

(3)!

Rewrite using definition of factorial:
`a! = a*(a-1)*(a-2)....*1`

3! = 3*2*1

You don't really have to write the 1, since it doesn't change the value

6