Question

5. Дано: А = {1, 3, 7, 11, 13}
В = {3, 7,11}
С = {1, 2, 3, 4, 5, 6, 7}
Найти:
A∩C∪B
(A\B)∩C
B×(A\C)

Answer 1

1) ={1, 3, 7, 11}
2) ={1}
3) ={33, 39, 77, 91, 121, 143}