Question:
SET IS A COLLECTION OF WELL DEFINED OBJECT BUT IN NULL SET THERE IS NO WELL DEFINED OBJECT THEN HOW CAN WE CALL IT AS A SET
Answer:
A set is said to be null set if it has no element. It is denoted by Φ.
Example: {x ∈ R | x2 = -5}
Null is a defined value and null set has zero value, so it is called a set.
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