Cardinality and Countability of Sets [EP2]

We explain that the union of two countable sets is countable, and the cartesian product of two countable sets is countable.

00:00 The union of two countable sets is countable
02:11 Example
03:20 The cartesian product of two countable sets is countable

Whole playlist:    • Cardinality and Countability  

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