A∪B={0,1,2,3,4,7} ,所以 Cu(A∪B)={5,6,8)
按照这个方法求出其他组合的结果,然后就证明出来了
当U={0,1,2,3,4,5,6,7,8},A={0,1,3,4,7},B={1,2}时,验证Cu(A∪B)=CuA∩
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