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Fie multimile: a) A={-4,-(-5),0,7,21}so B={5, -(-7),18,-8,15}
Aflati: AUB,AintersectieB,A\B,B\A


Răspuns :



AUB={-4,-(-5),0,7,21,5,-(-7),18.-8,15}

A intersectie cu B = multime vida 

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