Find the cardinal number of A2 - x - x - N and 3 - x - 7

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Cardinality

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Question

Find the cardinal number of $A_{2}$ = { $x$ : $x ϵ N$ and $3 \leq x < 7$ }

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Similar questions

Find the cardinal number of the following sets :

(i) $A_{1} = {- 2, - 1, 1, 3, 5}$

(ii) $A_{2} = {x : x \in N a n d 3 \leq x < 7}$

(iii) $A_{3} = {p : p \in W a n d 2 p - 3 < 8}$

(iv) $A_{4} = {b : b \in Z a n d - 7 < 3 b - 1 \leq 2}$ $Cardinal~Number~of~set~:The number of elements in a set is called its Cardinal Number.$

ξ

x

x \leq 10

x ϵ N

x

x \geq 4

x

2 < x < 7

ξ

x

x \leq 10

x ϵ N

x

x \geq 4

x

2 < x < 7

A^{^{'}} \cup B^{^{'}}

ξ

x

x \leq 10

x ϵ N

x

x \geq 4

x

2 < x < 7

(A \cap B)^{^{'}}

x

x ϵ N

3 < x \leq 6

x

x ϵ W

x < 4

\cap

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