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Which of the following sets are countable? Multiple answers are ok. a. The union of two finites sets. b. The union of a finite set
Which of the following sets are countable? Multiple answers are ok.
a. The union of two finites sets.
b. The union of a finite set and a countably infinite set.
c. The powerset of a finite set.
d. The powerset of countably infinite set.
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