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Example Questions
Example Question #11 : Functions, Relations, & Cardinality
If
Find the cardinality of .
Possible Answers:
Correct answer:
Explanation:
The question is asking us to find the number of elements in the union of A and A .
We simply combine the two sets together, and count the number of elements. If there are any elements that are the same, we keep one of them, and not both.
Now we simply count the number of elements in this set.
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