Question

Considere os conjuntos A {X e Z/x ⩾ -2} e B= {x£Z/x-3<0}. O conjunto AnB possui quantos elementos?



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Answer 1

$\large\boxed{\begin{array}{l}\sf B=\{x\in\mathbb{Z}/x-3<0\}=\{x\in\mathbb{Z}/x<3\}\\\sf A=\{x\in\mathbb{Z}/x\leqslant-2\}\\\sf A\cap B=\{x\in\mathbb{Z}/-2\leqslant x<3\}\\\sf A\cap B=\{-2,-1,0,1,2\}\implies possui~5~elementos\end{array}}$