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is a set that describes the union of two or more subsets, all the overlapping numbers are listed only once, even though they appear in both (or more) of the subsets.
non-terminating, non-recurring fractions. The set of irrational numbers is a subset of the real...
the maximum or minimum point on a curved graph. Also called a vertex.
(Z) all the positive whole numbers along with their negative counterparts, and...