Question

dau coroana!!!!!! g h nu trebu va rog

Answer 1

A={11,13,21,31,49,55}
B={13,31,48,55}
C={11,13,21,48}
a)A reunit B={11,13,21,31,48,49,55}
b)A intersectat B={13,31,55}
c)A reunit C={11,13,21,48,49,55}
d)A intersectat C={11,13,21}
e)C reunit B={11,13,21,31,48,55}
f)C intersectat B={13,31,48}