Aplicația este accesibilă de pe ecrane late

1 / 5
\textcolor{black}{_{P_5}}
5!
120
5
25
2 / 5
\textcolor{black}{P_4}
25
24
26
4
3 / 5
\textcolor{black}{P_n}
n!
(n-1)!
n
(n+1)!
4 / 5
\textcolor{black}{\frac{P_n}{P_{n-1}}=}
n-1
n
n!
n/(n-1)
5 / 5
\textcolor{black}{\frac{P_{n+1}}{P_{n-1}}=}
n+1
n-1
n
n(n+1)