How can i write following in factorials?: n(n^2-1) (eg. x!/e!) ?

2 ⤊

2006-12-21 08:29:24 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

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

2006-12-21 08:39:40 · answer #1 · answered by gianlino 7 · 1⤊ 0⤋

N^2-1 = (N+1)*(N-1)

So we have (n-1)*(n)*(N+1)
which is (N+1)! / (n-2)!

2006-12-21 08:39:59 · answer #2 · answered by firefly 6 · 1⤊ 0⤋

This isn't a factorial expression. You can't arbitrarily 'factorialize' something unless the conditions require it.

2006-12-21 08:39:48 · answer #3 · answered by Anonymous · 0⤊ 1⤋