Question

method of writing sets
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Answer 1

Answer:

There are two common ways of describing or specifying the members of a set: roster notation and set builder notation. These are examples of extensional and intensional definitions of sets, respectively.

Answer 2

flower bracket{} , and write the sets inside it.. with commas..!

ex:{1, 2,3,4}

or

{(1, 2), (1, 3) , (1, 4) }..this is called roster method..!

and there is another method called set builder method..!

set of all natural number

S={(x, y) : x belongs toN and y belongs to N