3 ways of defining a set:

Roster Method (e.g. B = {2, 4, 6, 8, 10})
Describing the elements (e.g. D = {x|x is a river in the Philippines})
Set-builder Notation (e.g. 
{x : x > 0})

The roster method is defined as a way to show the elements of a set by listing the elements inside of brackets.

Set-builder notation is a mathematical notation for describing a set by stating the properties that its members must satisfy.
can explaine each
paki explaine plZz yan kasi yung homework ko
Ay sori hindi ko nakita xD