Page 1 of 1
Looking for a proof: ! n = [n!/e]
Posted: Wed Feb 04, 2015 4:40 pm
by Rabeeb
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)
Re: Looking for a proof: ! n = [n!/e]
Posted: Wed Feb 04, 2015 11:14 pm
by *Mahi*
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)
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.
For your question -
Use this formula to approximate $!n$.