Question

Atividade sobre Intervalos Reais intervalos reais: 01) seja A = [2,7] e B = [5,9[. Determine: An B AUB A-B​

Answer 1

$\large\boxed{\begin{array}{l}\underline{\rm Observe~a~figura~que~eu~anexei.}\\\\\sf A=[2,7]\implies A=\{x\in\mathbb{R}/2\leqslant x\leqslant7\}\\\sf B=[5,9[\implies A=\{x\in\mathbb{R}/5\leqslant x<9\}\\\sf A\cap B=\{x\in\mathbb{R}/5\leqslant x\leqslant7\}\\\sf A\cup B=\{x\in\mathbb{R}/2\leqslant x<9\}\\\sf A-B=\{x\in\mathbb{R}/2\leqslant x\leqslant5\}\end{array}}$