what is set ?

 
  • set is a well-defined collection of objects. Sets are usually represented by capital letters ABCDXYZ, etc.

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    • The objects inside a set are called elements or members of a set. They are denoted by small letters a, bcdxyz, etc.

    • If is an element of a set A, then we say that “a belongs to A” and mathematically we write it as “a ∈ A”; if is not an element of A, then we write “b ∉ A”. E.g. If Z is a set of all integers, then 5 ∈ Z but 0.6 ∉ Z.

     

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set is a well defined collection of objects

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a set is a well defined collection  of all the objects

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