Mathematics · Set Theory
Which of the following sets is countable?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The set of all subsets of &DoubleStruckCapitalN;
- 2The set of all functions from &DoubleStruckCapitalQ; to {0, 1} which vanish outside a finite set✓
- 3The set of all functions from &DoubleStruckCapitalQ; to {0, 1}
- 4The set of all functions from &DoubleStruckCapitalQ; to &DoubleStruckCapitalQ;
Correct answer
The set of all functions from &DoubleStruckCapitalQ; to {0, 1} which vanish outside a finite set
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