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2014-06-27T13:43:21+08:00

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1) Roster method - aka listing method. You just need to list all the elements
   A = {1,2,3,4,5,...}

2) Set-builder notation 
   A = { x| x is a natural number}

3) Verbal - using sentence to describe set
   Set A is a set that contains natural numbers.
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2014-06-27T16:31:57+08:00

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Roster method o tabular and the other one is set builder notattion.
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