9000140502

SubArea: 
Combinatorics
Level: 
B
Project ID: 
9000140502
Accepted: 
1
Clonable: 
0
Easy: 
1
Simplify for \(n\in \mathbb{N}\). \[ \frac{(n + 1)!} {(n - 1)!} \]
\(n^{2} + n\)
\((n + 1)^{2}\)
\(\frac{n+1} {n-1}\)
\(- 1\)