Question

A={x€N|6<x<_13} te rog mult

Answer 1

 x ∈ { 7 , 8 , 9 , 10 , 11 , 12 ,13}
Succes!!

Answer 2

$6\ \textless \ x \leq 13 \\\\ x \in N \\\\ ===\ \textgreater \ x \in (6;13] \\\\ A \in \{ 7;8;9;10;11;12;13 \}$