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daca card A=37 card B=54 card A\B=29 aflati card A B card A U B card B\A

Răspuns :

Lucasela

card A=37

card B=54

card A\B=29

=> card A∩B=37-29=8

card A∪B=37+54-8=29+54=83

card B\A=83-37=46

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