Question

What is the cardinality of the ff. sets? 

1. Z2 5. 2Z 

2. Z*4 6. R 

3. N 

4. Z

Answer 1

Solution:

Clearly, the cardinality of the set of integers is infinite because the integers go on forever in both directions.

This is the same for all other sets given.

Hence, the cardinality of all given sets is infinite.