Sep
05

## The union of a finite set and a countable set is a countable set.

The union of a finite set and a countable set is a countable set.

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# Tag: countable collection

## The union of a finite set and a countable set is a countable set.

## Prove that the set of all rational numbers is countable.

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Sep
05

The union of a finite set and a countable set is a countable set.

Sep
05

Prove that the set of all rational numbers is countable.