Răspuns :
ex:
A={2,4,5,6}
B={5,3,1,2,7,9}
A intersectie B={2,5}
AUB={1,2,3,4,5,6,7,9} ----sunt 8 elemente
A={2,4,5,6}
B={5,3,1,2,7,9}
A intersectie B={2,5}
AUB={1,2,3,4,5,6,7,9} ----sunt 8 elemente