Question

Daca A={1,2,5,7,9} si B={1,3,9,11} sa se determine AuB;AuB;A\B

Answer 1

AuB={1,2,3,5,7,9,11};  A intersectat cu B ={1,9};  A\B={2,5,7}

Answer 2

AuB={1,2,3,5,7,9,11}
AnB={1,9}
A/B={2,5,7}