Question

Dados os intervalos: A = {x R12 < x < 4} e B = {x pertence R11 < x < 3} pede-se: A UB e An B. O {x pertenceR11​

Answer 1

$\large\boxed{\begin{array}{l}\sf A=\{x\in\mathbb{R}/2<x<4\}~B=\{x\in\mathbb{R}/1<x<3\}\\\sf A\cup B=\{ x\in\mathbb{R}/1<x<4\}\\\sf A\cap B=\{x\in\mathbb{R}/2<x<3\}\end{array}}$