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1.if A is a set, give two subsets of A.

2. (a) if A and B are finite sets and A is a proper subset of B, what can u say about the cardinalities of the two sets??

(b) if the cardinality of A is less than the cardinality of B, does it follow that A is a proper subset of B??

3.if A and B have the same cardinality, does it follow that A=B? Explain.

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by angelshaiph

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