Question

Determinati multimile A si B care indeplinesc simultan conditiile.
a. au acelasi cardinal, b. A∪B=(1,2,3,4,5), c. A/B=(1,4) d) A∩B⊄(3,4,5)

Answer 1

A={1,2,4}
B={2,3,,5}

au acelasi cardinal 3
A∩B={2}⇒⊄{3,4,5}
A∪B={1,2,3,4,5}
A\B={1,4}