MathFundamentalsSets

Basics of functions

A cardinality of a domain

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Suppose we have two sets: $W = \{a^2, b^2, c^3, d^6\}$ and $Y = \{1, 2, 3, -1, 5, 4, 8\}$ , and $g$ is a function from $W$ to the set of whole numbers as defined in the following table:

$a^2$	1
$b^2$	3
$c^3$	2
$d^6$	-1

What is a cardinality of the domain of this function?

Tip: You can read about the cardinality of sets in the topic Basics of sets

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