• 2022-06-06
    A、B、C是任意集合,以下正确的是?
    A: A´B = B´A
    B: (A´B)´C = A´(B´C)
    C: A´(B∪C) = (A´B)∪(A´C)
    D: 如果A´C Í B´C,则A Í B