What are the two ways of writing sets?

There are two ways of writing sets:

1. Roster Method

-listing the elements in any order and enclosing them with braces.

Example:

A= {January, February, March…December}

B={1,3,5…}

2. Rule Method

-giving a descriptive phrase that will clearly identify the elements of

the set.

Example:

C={days of the week}

D={odd numbers}

- listing the elements in any order and enclosing them in a bracket.

A = {1, 2, 3, 4}

2. Rule Method

- giving a descriptive phrase that will clearly identify the elements of the set.

A = { first four counting numbers}
ang mga batayan sa pagsusulat ng historya ay ang mga mananaliksik. at dahil din sa grupong tinatawag na tropapa.
The two methods in writing sets are 1.) Listing method and 2.)Roster method.
1. listing method i.e A = {1, 2, 3, 4, 5}

2. set builder notation i.e B = {x | 1 < x < 10 and 3 | x}