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WEEK FOUR
SETS
CONTENTS:
SUB TOPIC: DEFINITION OF SET
A set is a collection of distinct objects, things, objects or numbers.
Examples includes:
Basically we can conclude that any clearly defined collection of things, objects or numbers constitutes a set.
When the number of elements in a given set is countable, the set is called a FINITE SET. E.g whole numbers lying between 1 and 10, members of a football team, etc. but if the number of elements in a set is not finite/countable, then the set is called an INFINITE SET. E.g real numbers, rational numbers, etc.
CLASS ACTIVITIES:
SUB TOPIC: SET NOTATION METHODS
Each member of a set is called an element of the set. Capital letters will be used to denote sets while small letters will be used to denote the elements of a set.
When an element belongs to a set , we write and say that is a member or element of If is not a member or element of we write and say that does not belong to .
Example:
If is the set of all prime numbers and then . If , then .
A set is completely specified in the following ways:
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