Question 1208679: What is the cardinality of set F?
F = { { Ø }, (x + y), 1/4, 1/3, 1/2, A, B, C, D }
What do I see inside the bigger set?
I see 9 elements.
The cardinality is 9.
Do you agree?
Answer by Edwin McCravy(20054)   (Show Source):
You can put this solution on YOUR website!
F = { { Ø }, (x + y), 1/4, 1/3, 1/2, A, B, C, D }
Yes, the 9 elements of F are
1. { Ø }
2. (x + y)
3. 1/4
4. 1/3
5. 1/2
6. A
7. B
8. C
9. D
So you are right, the cardinality (count) is 9.
Comment:
The set { Ø } is not empty because it contains one element, the empty set Ø.
And Ø is only an element of { Ø } and not an element of F.
The element (x + y) is a single number depending upon what number x and y are.
Edwin
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