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14 Chapter 1 Sets and Probability Empty Set The empty set, written as /0or{}, is the set with no elements. The empty set can be used to conveniently indicate that an equation has no solution. For example {x|xis real and x2 =−1}= 0/ By the definition of subset, given any set A, we must have 0/ ⊆A. EXAMPLE 1 Finding Subsets Find all the subsets of {a,b,c}. ...
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