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1. It is taken to be any collection of objects, mathematical or otherwise. 2. Two sets are said to beif AnB = 0.3. Let A be a set. The set of all subsets of A is called4. Theof A and B is the set of elements in either A or B.5. Thedenoted AxB, of two sets is the set of orderedpairs {(a,b)a e Ab E B}.6. A relation is called anif it is reflexive, symmetric,and transitive.7. It is a rule that assigns a single value f(x) E Y to each element X e X.8. For a finite set A, theequals the number of elements inA.9. It is a set containing exactly one element such as{a}.10. We say that A is a of B if, for all x, if x e A then x EB. |
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