Question

Sendo A n,3 = A n,2. Calcule n:

Answer 1

N = 3+ 2
N=5
Espero que seja assim.

Answer 2

An,3 = An,2

$\frac{n!}{(n-3)!}= \frac{n!}{(n - 2)!} \\ \\ (n - 3)! =(n -2)! \\ \\ (n-3)!=(n-2)(n-3)! \\ \\ n - 2 = 1 \\ \\ n = 3$