Write the expression without using the factorial symbol.

Question

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

my work:
(n+1)!/((n+1)(n-1)!)

=1/(n-1)?

Thanks in advance.

Answer 1

close

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

Answer 2

hmm..the answer key says its n(n+1), maybe the answer key is wrong

Answer 3

wait, nevermind, I got it :)
thanks :P

Answer 4

You know what?

I looked at "my work" and assumed that was the starting question.

so here it goes once more

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

sorry
I should be more careful when reading questions.