math
posted by sh on .
Write the expression without using the factorial symbol.
(n+1)!/(n1)!
my work:
(n+1)!/((n+1)(n1)!)
=1/(n1)?
Thanks in advance.

close
(n+1)!/(n1)!
= (n+1)(n)(n1)!/((n+1)(n1)!
= n 
hmm..the answer key says its n(n+1), maybe the answer key is wrong

wait, nevermind, I got it :)
thanks :P 
You know what?
I looked at "my work" and assumed that was the starting question.
so here it goes once more
(n+1)!/(n1)!
= (n+1)(n)(n1)!/n1)!
= n(n+1)
sorry
I should be more careful when reading questions.