9000140503

SubArea: 
Combinatorics
Level: 
B
Project ID: 
9000140503
Accepted: 
1
Clonable: 
0
Easy: 
0
Simplify for \(n\in \mathbb{N}\). \[ \frac{(n + 1)! + (n - 1)!} {n!} \]
\(\frac{n^{2}+n+1} {n} \)
\(2\)
\(n^{2} - 1\)
\(\frac{n^{2}-n+1} {n} \)