A set is a group of objects. Each object is known as a member of the set. A set can be represented using curly brackets. So a set containing the numbers 2, 4, 6, 8, 10, ... is: {2, 4, 6, 8, 10, ... } . Sets are often also represented by letters, so this set might be E = {2, 4, 6, 8, 10, ...} . Alternatively, E = {even numbers} .
Some sets are commonly used and so have special notation:
for example:
means that x is in the set of integers,
i.e x is a integer
ϵ means ' is a member of '
Subsets
Number of Members
The Universal Set
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1. What are Venn diagrams and how are they used in set theory? 
2. How can Venn diagrams help in solving set theory problems in competitive exams? 
3. What are the main components of a Venn diagram? 
4. How can one determine the complement of a set using a Venn diagram? 
5. Can Venn diagrams be used to solve problems involving more than two sets in set theory? 
131 videos171 docs117 tests


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