math

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Write the expression without using the factorial symbol.
(n+1)!/(n-1)!

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

=1/(n-1)?

• math -

close

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

• math -

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

• math -

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

• math -

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.

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