Question

elementele mulțimi {x|€N3<x<5}sunt?

Answer 1

$M=\left\{x\:| \: x \: \in \: \mathbb{N},3 < x<5\right\}$

$3 < x < 5 = (3,5)$

$x \: \in \: \mathbb{N} => x \: \in \: \left\{4 \right \}$

$M=\left\{4 \right \}$