Question

Intervalos na reta numérica.
a){ x e r / -3 < x ≤ 2 }  ∩  { x e r / -1 ≤ x <4 }
b) { x e r / x ≥ 3 } ∩ { x e r / -4 ≤ x < 6 }

Answer 1

Olá, Jeehssy.

$a)\,\,\{ x \in \mathbb{R}\,|\,-3< x \leq 2 \} \cap \{ x \in \mathbb{R}\,|\,-1 \leq x <4 \}\\\\ \,...........\,-3\circ\,*************\,2\bullet\,....................................\\\\ \,.............................-1\underbrace{\bullet\,\,******\,\,2\,\bullet}_{\cap}******\,4\circ\,...............\\\\\\ \text{Resposta: }\boxed{\{ x \in \mathbb{R}\,|\,-1 \leq x \leq2 \}}$
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$b)\,\,\{ x \in \mathbb{R}\,|\, x \geq 3 \} \cap \{ \in \mathbb{R}\,|\, -4 \leq x < 6 \} \\\\ \,.................................\,3\bullet\,*************************\\\\ \,....\,-4\bullet\,*******\,\,3\underbrace{\bullet***********\,6\,\circ}_{\cap}...............................\\ \\\\ \text{Resposta: }\boxed{\{ x \in \mathbb{R}\,|\, 3\leq x < 6 \} }$