. Without referring to Theorem 5.3.8, prove part (a) of Corollary 5.3.9: Ifis a finite
Chapter 5, Problem 6(choose chapter or problem)
. Without referring to Theorem 5.3.8, prove part (a) of Corollary 5.3.9: Ifis a finite pairwise disjoint family of denumerable sets,then is countable.
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