Definition:

A set is a collection of well-defined objects. The objects

in a set are called elements or members of that set.

Definition:

(i) A set is said to be a finite set if it contains only a finite number of elements in it.

(ii) A set which is not finite is called an infinite set.

Definition:

(i) If a set X is finite, then we define the cardinality of X to be the number of

elements in X . Cardinality of a set X is denoted by n(X) .

(ii) If a set X is infinite, then we denote the cardinality of X by a symbol 3.

A set is a collection of well-defined objects. The objects

in a set are called elements or members of that set.

Definition:

(i) A set is said to be a finite set if it contains only a finite number of elements in it.

(ii) A set which is not finite is called an infinite set.

Definition:

(i) If a set X is finite, then we define the cardinality of X to be the number of

elements in X . Cardinality of a set X is denoted by n(X) .

(ii) If a set X is infinite, then we denote the cardinality of X by a symbol 3.

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