October 2020 0 156 Report
Questão 18 (Osec – SP) Sejam A e B os seguintes subconjuntos:
A={x∈IR/2≤x≤5} e B={x∈IR/x>4}.

Então, podemos afirmar que:
a) A−B⊂B

b) A−B⊂A

c) B−A⊂A


d) A−B={x∈IR/2<x<4}

e) B−A={x∈IR/x≥5} 
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