Răspuns :
ex.3
AUB= {1,2,3,4,5,7}
A^B={5,7}
A-B={1,3}
B-A={2,4}
ex.4
a)A={1,3,5,7}
B={5,7,4,2}
C={7,4,6,9}
b)AUB={1,3,5,7,4,2}
AUC={1,3,5,76,9,4}
BUC={5,7,4,2,6,9}
A-B={1,3}
A-C={1,3,5}
B-C={5,2}
AUBUC={1,2,3,4,5,6,7,9}
A^B^C={5,7}
(AUC)-B={1,3}
ex.3
AUB= {1,2,3,4,5,7}
A^B={5,7}
A-B={1,3}
B-A={2,4}
ex.4
a)A={1,3,5,7}
B={5,7,4,2}
C={7,4,6,9}
b)AUB={1,3,5,7,4,2}
AUC={1,3,5,76,9,4}
BUC={5,7,4,2,6,9}
A-B={1,3}
A-C={1,3,5}
B-C={5,2}
AUBUC={1,2,3,4,5,6,7,9}
A^B^C={5,7}
(AUC)-B={1,3}