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Union of two sets

The union of two sets $$A$$ and $$B$$ is a set that consists of the elements that are either in $$A$$ or $$B$$ or in both. The set is written $$A\cup B$$.

The union of the odd and even numbers is the set of all the integers.

$$$ \{\Tblue{1},\Tblue{2},\Tblue{3}\}\cup \{\Tgreen{0},\Tgreen{2},\Tgreen{4}\} = \{\Tgreen{0},\Tblue{1},\Tred{2},\Tblue{3},\Tgreen{4}\}$$$

$$A$$ and $$B$$ are a subset of $$A\cup B$$.

Union of two sets
Union of two sets