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Sets R, S and T are finite and T contains more elements than S. The number of elements in T minus the number of elements in S is equal to the number of elements in the set R∩T minus the number of elements in the set R∩S.
Quantity A
The number of elements in the set R∪S
Quantity B
The number of elements in the set R∪T
C显示答案
以上解析由 考满分老师提供。
