Question

Se considera multimile A={x€|N | 18/x-2€|N} si B=x€|N | 24/x+3€|N}
Calculati AUB, AΠB, A/B si B/A

URGENT

Answer 1

x={0,1,2,3,..,infinit}
18/(0-2)=-9 nu apartine lui N
18/(1-2)=-18 nu apartine lui N
Deci
18/(2-2)=0 apartine lui N
18/(3-2)=18 apartine lui N
Deci
A={2,3,4,5,8,9,16,20}
B={0,1,3,5,9,21}
AUB={0,1,2,3,4,5,8,9,16,20,21}
AUinvwrsB={3,5,9}
A/B={2,4,8,16,20}
B/A={0,1,21}