(n+1)! / (n-2)!

thx 4 all the ppls that come in and read my post ^^

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- Apr 22nd 2011, 12:36 PMcwlcwl1212simplify the ratio of factorials
(n+1)! / (n-2)!

thx 4 all the ppls that come in and read my post ^^ - Apr 22nd 2011, 12:46 PMPlato
- Apr 22nd 2011, 12:48 PMcwlcwl1212
i understand that (n+1)! = (n+1) x (n+1-1)

but i don't understand how can i extract (n-2)! to the equation i need... - Apr 22nd 2011, 01:20 PMe^(i*pi)
n! = n * (n-1) * (n-2)!

- Apr 22nd 2011, 04:14 PMHallsofIvy