Pi Formula

Can you prove that
Pi = lim 2*(2^n / (n!/k!/(n/2)!))^2
[as n approaches infinity]

???

You're all mental midgets. It was proven already in 1738 by Moivre, whose education consisted mainly of rote memorizing Bible:
https://en.wikipedia.org/wiki/Normal_distribution#History

and you can't prove it using modern education.