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SET NOTATION
In math, a set is a collection of things, usually numbers. They are often represented by a Capital Letter, such as A, B or C.
Sets are often denoted by the curly brackets { }.
For example, the set of the first 5 odd numbers would be written with a capital letter and curly bracket, such that:
A= {1 , 3, 5, 7, 9}.
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