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- To: "MLUG Members" <EMAIL:PROTECTED>
- Subject: Re: [MLUG] N-Queens Problem Solver
- From: "Jonathan King" <EMAIL:PROTECTED>
- Date: Fri, 18 Apr 2008 19:52:03 -0700
- Delivery-date: Fri, 18 Apr 2008 21:52:23 -0500
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On Fri, Apr 18, 2008 at 6:10 PM, Stephen Montgomery-Smith
<EMAIL:PROTECTED> wrote:
>
> Here is a math problem I worked on when I was a student. Show that
>
> N
> Sum (N choose i) x(x+i)^(i-1) y(y+n-i)^(n-i) = (x+y)(x+y+n)^(n-1).
> i=0
That's pretty cute. Also an evil thing to spring on somebody at 10:51
in the evening...
jking
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