Question

fie mulțimile A={11,13,21,31,49,55}, B={13,31,48,55}, C={11,13,21,48}. Aflati

a) AUB; b) AnB; c) AnC; d) AnC;
e) CUB; f) CnB; g) An (BUC); AU(BnC).

AJUTOR CÎT DE REPEDE DE POATE !!!!!

Answer 1

AUB={11,13,21,31,48,49,55}
AnB={13,31,55}
AnC={11,13,21}
CUB={11,13,21,31,48,55}
CnB={13,48}
AU(BnC)=AU{13,48}={11,13,21,31,48,49,55}
An(BUC)=An{11,13,21,31,48,55}={11,13,21,31,55}