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Welcome to our Math lesson on Cartesian Product, this is the second lesson of our suite of math lessons covering the topic of Relation and Function, you can find links to the other lessons within this tutorial and access additional Math learning resources below this lesson.
Let us consider two number sets A = {1, 2, 3} and B = {12, 15}. Let's suppose we have a task to form all possible ordered pairs with the elements of these two sets. As stated above, the first element of each pair must belong to set A while the second element to set B. Given this condition, we obtain the following list of ordered pairs:
By definition, the set composed of all these ordered pairs is called the Cartesian product of the two sets A and B. In symbols, we represent the Cartesian product as A × B.
An example of the application of the Cartesian product in practice is the coordinates system, otherwise known as the Cartesian plane, where all ordered pairs represent a specific point of the coordinates system.
The number sets
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