A={x/x is factor of 12
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the ways in naming a set are: roster method, rule method and set builders
1) listing method: { 1,2,3} rule method: {x| x is a positive whole number less than four} 2) listing method: { 2,4,6,8,....}. rule method: {x| x is a positive even number }
rule method - writing a common property/a descriptive phrase, and agreeing that those objects, and only those are elments of the sets. ex. rule method X= X is an even number between 25 and 40. roster method X= {26,28,30,32,34,36,38}
The roster method represents a set of something. In algebra, the roster method is used to describe a simpler set that is difficult to describe.
Write the elements of the set in a roster form.