Pre-muted
Number Theory
Level
2
You are given that \[ \dfrac{n!}{(n-x)!} = n \]
Find \(x\).
Bonus: Can you also find one exception for the above formula?
Notation: \(!\) denotes the factorial notation. For example, \(8! = 1\times2\times3\times\cdots\times8 \).
by
Viki Zeta