Răspuns :
AUB-REUNIT a{2,3,,5,7,9} b{4,5,6,7}
AuB={2,3,4,5,,6,7,9}
AU(INTORS)B-INCLUS
{5,7}
A-B-minus
{2,3,9}
AuB={2,3,4,5,,6,7,9}
AU(INTORS)B-INCLUS
{5,7}
A-B-minus
{2,3,9}