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According-to-wikipedia-the-cardonality-of-a-set-of-all-finite-subsets-of-any-countably-infinite-set-is-0-How-can-we-prove-this-

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Question Number 5088 by FilupSmith last updated on 11/Apr/16
According to wikipedia, the cardonality of a set of all finite subsets of any countably infinite set is ℵ_0 . How can we prove this?
Accordingtowikipedia,thecardonalityofasetofallfinitesubsetsofanycountablyinfinitesetisℵ0.Howcanweprovethis?

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