SETS

Example 1:

{2,4,6,8} = {x|x is an even whole positive less than or equal 8}
= {2x|x = 1,2 ,3,4}


Example 2:

Let S = {1,2,3}

This set S has a total of 8 subsets :

{ }, {1}, {2}, {3}, {1,2}, {1,3}, {2,3}, {1,2,3}.