Find the cardinal number of the following set:
$A_{1}$ = {-2, -1, 1, 3, 5}

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Solution

The number of distinct elements in a finite set is called cardinal number.
The given set $A_{1}$ has 5 distinct elements.
Hence it's cardinal number is 5.

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

A = {1, 2, 2, 3, 4, 5, 5, 6, 6, 7, 7, 8}

If A = {2, 3, 5, 7}, then the cardinal number of set A is 5.

A

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P (A)

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