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Olek: A∪(B\C)=((A∪B)\C)∪(A∩C)
Jak udowodnić taka równość?
15 mar 09:36
kochanus_niepospolitus:
1) B\C = B∩C'
Więc:
L = A ∪ (B∩C')
2) (A∪B)\C = (A∪B)∩C' = (A∩C') ∪ (B∩C')
Więc:
P = [(A∩C') ∪ (B∩C')] ∪(A∩C) = (A∩C') ∪ (B∩C') ∪(A∩C) = (A∩C') ∪ (A∩C) ∪ (B∩C') =
= [A∩(C∪C')] ∪ (B∩C') = A ∪ (B∩C') = L
15 mar 09:50
15 mar 09:50