Question

Sabendo que n!/(n-1)! = 3, Calcule (n+1)/2 .

Answer 1

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

ele quer (n+1)/2

=(3+1)/2
=4/2
=2 #

Answer 2

Sabendo que n=3

(n+1)/2

3+1/2

4/2

2    

Resp: 2

: )       OK?