Question

$Dados os intervalos A = [4,12], B = ]9, 19[, determine A∩B.$

Answer 1

$\text{Sendo:} \\\\ \circ \text{A} = [4,12] \\ \circ \text{B} = \ ]9,19[ \\\\ \bullet \ \text{A} \cap \text{B} = \ ]9,12]$