Odpowiedź:
a) 1,2,3,4,6,7,8,9. 1,2,3,,4,5,6,9. 3,4,9. 3,7,8
b) a/{1,2,6}= 3,4,9. {4,9}÷c= zbiór pusty.
c) 1,2. 1,2,6
d) {5,6,7,8,10}÷{4,5,9,10}= 5,10. a'÷{3,4,7,8,9,10}=7,8,10. 3,4,5,6,7,8,9,10
