Examples

$A = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)$

Step 1

The cardinality of a set is the number of members in the set.

$10$

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$