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Here are the definitions:

Set
A set is an unordered collection of unique objects, known as elements or members, that can be anything (numbers, letters, people, etc.). Sets are used to group objects together based on certain properties or characteristics.

Tabular Form (Roster Form)
A set can be represented in tabular form by listing its elements within curly brackets {} and separating them with commas. For example:

A = {1, 2, 3, 4, 5}

This represents a set A containing the elements 1, 2, 3, 4, and 5.

Descriptive Form
A set can be represented in descriptive form by describing the properties or characteristics of its elements. For example:

A = {x | x is a positive integer less than 6}

This represents the same set A as above, but describes its elements as positive integers less than 6.

Set Builder Notation
Set builder notation is a concise way to represent a set using mathematical symbols. It consists of:

{ x | property of x }

Where:

x is the variable representing the elements of the set.
"|" is the "such that" symbol, indicating the property that x must satisfy.
"property of x" is the condition that x must meet to be included in the set.

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