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concept
Empty Set
The set with no elements
Empty Set - The Set With Nothing
A set containing no elements at all.
Symbols: or
Number of elements:
Important:
has zero elements.
has one element (the number zero).
Don't confuse them!
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Part of NCERT 11 Mathematics
The set with no elements
A set containing no elements at all.
Symbols: or
Number of elements:
Important:
has zero elements.
has one element (the number zero).
Don't confuse them!
Understanding set sizes
A set where you can count all elements and the counting ends.
Definition: A set with a definite number of elements.
Notation: = number of elements in set
Test your understanding
Which collection is NOT a set?
When are two sets the same?
Two sets are equal if they have exactly the same elements.
Nothing more, nothing less.
Symbol:
Key Point: Order doesn't matter. Repetition doesn't matter.
Only the elements themselves matter.