Can any1 plz give an ezly understandable proof of how " !n = [n!/e] "?

(Here !n denotes the derangement of n elements and [x] denoted the closest integer to x)

## Looking for a proof: ! n = [n!/e]

### Re: Looking for a proof: ! n = [n!/e]

Please do not use incorrect English intentionally. That creates a very poor impression of you while lowering the IQ of the whole forum by 5 points.Rabeeb wrote:Can any1 plz give an ezly understandable proof of how " !n = [n!/e] "?

(Here !n denotes the derangement of n elements and [x] denoted the closest integer to x)

For your question -

Use this formula to approximate $!n$.

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Use $L^AT_EX$, It makes our work a lot easier!

Nur Muhammad Shafiullah | Mahi

Use $L^AT_EX$, It makes our work a lot easier!

Nur Muhammad Shafiullah | Mahi