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Re: Inconsistent behavior?

Mathematica avoids expanding Binomial (and other functions) in cases where 
the resulting expression might be too long to be of interest. You can 
override this by using FunctionExpand.

Binomial[n, 6] // FunctionExpand

1/720 (-5+n) (-4+n) (-3+n) (-2+n) (-1+n) n

Stephen Luttrell
West Malvern, UK

"angela" <mpopyft at> wrote in message 
news:ft7ggo$bs3$1 at
> Binomial[n,4] yields
> 1/24 (-3+n) (-2+n) (-1+n) n
> Binomial[n,5] yields
> 1/120 (-4+n) (-3+n) (-2+n) (-1+n) n
> Binomial[n,6] yields
> Binomial[n,6]
> Binomial[n,7] yields
> Binomial[n,7]
> Is some setting doing this.
> Thanks;
> Angela

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