Question

introduction of sets​

Answer 1

Answer:

A Set is an unordered collection of objects, known as elements or members of the set. An element 'a' belong to a set A can be written as 'a ∈ A', 'a ∉ A' denotes that a is not an element of the set A.

Step-by-step explanation:

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Answer 2

Answer:

hope it will help u

Step-by-step explanation:

Set is a well define collection of objects