• 2022-06-06
    A、B、C、D为任意集合,以下正确的是
    A: (A∪B)´(C∪D) = (A´C)∪(B´D)
    B: (A-B)´(C-D) = (A´C)-(B´D)
    C: (A∩B)´(C∩D) = (A´C)∩(B´D)
    D: (AÅB)´(CÅD) = (A´C) Å (B´D)