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cardaclysm兑换码-卡包兑换码

card(AUBUC)=cardA+cardB+cardC-card(A交B)-card(C交B)-card(A交C)+...1、能给你解答很高兴。首先card(A∪B)=card(A)+card(B)-card(A∩B).再加一个元素CC=card(c)-card(B∩C)-card(A∩C)+card(A∩...