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Senin, 16 Januari 2012


      Every set always has some elements or no elements.
      Let us consider this figure.

That figure show us set of whole number less than 10.
We can mention each elements such as 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
In a set the notation for element is E.
How many the elements of that set?
It is 10.
The notation to state the number of elements of a set is n = 10.
Now, see this picture!

What set is it?
It is set of prime number less than 12.
What elements are they?
The elements of this set is 2, 3, 5, 7 and 11.
How many its elements?
It is n = 5.
How about this one, guys?

This one is set of even numbers less than 10.
How  many its elements?
It is 4 elements.
Thus, n = 4.

Okay guys,now find the number of the elements of these set!
1. Set of integers between -3 and 5.
2. Set of odd numbers less than 13.
3. Set of Indonesian presidents name.
4. Set of whole numbers less than 20.
5. Set of continental name.
Send back for me,okay.

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