Question

determinati multimile A ={x|x apartine N si xapartine D 12

Answer 1

$A=\left \{ x\:|\:x\:\in\:\mathbb{N} \:si\:x\:\in\:D_{12}\right \}$

$D_{12}=\left \{ \pm1,\pm2,\pm3,\pm4,\pm6,\pm12 \right \}$

$x \: \in \: \mathbb{N} = > x \: \in \: \left \{ 1,2,3,4,6,12 \right \}$

$= > A=\left \{ 1,2,3,4,6,12 \right \}$