Asked by Katie S
Simplify:
n!-(n-1)!
---------
(n-1)!
n!-(n-1)!
---------
(n-1)!
Answers
Answered by
Reiny
( n(n-1)! - (n-1)! )/(n-1)!
= (n-1)! (n-1)/(n-1)!
=n-1
e.g. (5! - 4!)/4! , for the case n=5
= (5(4!) - 4!)/4!
=4!(5-1)/4!
= 5-1
= 4
= (n-1)! (n-1)/(n-1)!
=n-1
e.g. (5! - 4!)/4! , for the case n=5
= (5(4!) - 4!)/4!
=4!(5-1)/4!
= 5-1
= 4
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