Question

Sejam os conjunto A= ]-infinito, 1[   e B= ]1,  +infinito [.
Determine
A U B
A interacção B​

Answer 1

$A=]-\infty, 1[=\{x\in\,\mathbb{R}/x\textless1\}$

$B=]1,+\infty[\,=\{x\in\,\mathbb{R}/x>1\}$

$A\cup\,B=\{x\in\,\mathbb{R} \}$

$A\cap\,B=\varnothing$