Question

Dados os conjuntos A ={x ∈ IR / x ≥ −2,7} e B ={x ∈ IR /− 4 < x ≤ 3}, determine IR − (A ∪ B).

Answer 1

Resposta:

$A = \{x \in \: IR | \: x \geqslant - 2,7 \} \\ B = \{x \in \: IR | \: - 4 < x \leqslant 3 \} \\ \\ IR - (A \: \cup \: B) = \\ \\ = IR - \{x > - 4 \} \\ \\ = \boxed{\bf{ \large{\green{x \leqslant - 4}}}} \: \\ \\ \boxed{\large \blue{ \bf{ \underline{Bons \: Estudos!}}}}$