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A={3,7,11,15siB={2,5,7,15,21} determina a)AUBsib)ANB



Răspuns :

A={3,7,11,15}
B={2,5,7,15,21}
a) A intersectat cu B={2,3,5,7,11,15,21}
b) A reunit cu B={7,15}
AuB={2,3,5,7,11,15,21}(toate elementele)
A∩B={7,15} (elementele comune)