1.19. A\B=A\(A B) tenglikni isbotlang.
1.20. A (B\A)= tenglikni isbotlang.
1.21. A U,B U,A∩B= bo„lsin. Quyidagilarni Eyler-Venn diagrammalari
yordami bilan tasvirlang va ulardan tenglarini ko„rsating:
1) (A ∩B) ; 2) A∩B ; 3) A UB; 4) AUB ; 5) (A∩B) ; 6) A UB .
1.22. a) Munosabatlarni isbot qiling:
1) (AUB)\B=A; 2)(A\B)U(B\A=(AUB)\(A∩B);
3)AU(B∩C)U(AUB)∩(AUC); 4) (AUB)\C=(A\C)U(B\C);
b) A va B lar U universal to„plamning qism to„plamlari.
Isbot qiling: 1) (A∩B) =A UB ; 2) (A∩B)=A\(A∩B ).
1.23. Ifodalarni soddalashtiring: 1) B∩(AUB); 2) (A∩B)∩(A ∩B).
Do'stlaringiz bilan baham: |