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WORKBOOK
“The concept of a set is fundamental to mathematical thought. It was
developed into a new branch of mathematics in the late Nineteenth Century,
by a German mathematician Georg Cantor. Since the beginning of the
Twentieth Century set theory has developed rapidly, and today it has important applications
in nearly every branch of mathematics”
https://www.youtube.com/watch?v=kgW-LuwmmQs
Set: ………………………………………………………………………………………………………………………………………………..
………………………………………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………………………………….
For example; the statement “some students in the classroom’’ does not define a set. Because the phrase
‘’some students’’ is not a clear criterion for the elements of a set.
Example 1: The set of letters of the English alphabet; the set of natural numbers, etc.
The following are well – defined sets:
1) The first 15 letters of the Turkish alphabet.
2) The days of the week.
3) Integers less than 10.
4) The capital cities of Europe.
The following are not sets:
1) Intelligent people.
2) Good basketball players.
3) Books which are fun to read.
Example 2: Write the elements of the following sets.
A = {Prime numbers less than 10} =
B = {Even numbers between 4 and 13} =
C = {The letters in the word ANKARA} =
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