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A = {1;2;3;7} B - {8;7;1;3}

AuB =

A (U In sus) B =

A-B =


Răspuns :

AuB = {1,2,3,7,8}
AUB = {1,2,3,7,8}
A-B = {8}
AUB={1;2;3;7;8}
A-B={2}