On Mon, 06 Jul 2009, bill lam wrote:
> model of (!y)%(!x)*(!y-x) looks correct for integers.
>
> _2 outof _5 is mentally calculated as
As pointed out by Brian, this should be 2 outof _5 and
_2 outof _5 should be 0
>
> _5 * _6 _* 7 * _8 * ....
> ---------------------------------
> 2 * _7 * _8 * ......
>
> cancelling the common terms
>
> _5 * _6
> ------------------ which is 30, agreed with 2 ! _5
> 2
30
------------------- = 15
2
!n is defined as the product of n * (n-1) * ... until n decrese
to 1, for negative number such as _5, this never stop because it will
never reach 1, hence it is the infinite product,
_5 * _6 * _7 * _8 * ......
Hope it is correct this time.
--
regards,
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