N!/N
n - 8 = 11 Therefore, n = 11 + 8 n = 19
It is "permutación"
n=10
90
29
25 apex
Sodium (Na)
-7
In 3n-1 equals 11, n is 4.3n - 1 = 113n - 1 + 1 = 11 + 13n = 123n/3 = 12/3n = 4
n p =n!/(n-r)! r and n c =n!/r!(n-r)! r
6 + n = 17n = 17 - 6Therefore, n = 11.