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\leftline{Mathematics 243 -- Algebraic Structures}
\leftline{Definitions Quiz 1 -- September 7, 2012}
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\leftline{Your Name: $\underline{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }$}
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A) (5)  What is the definition of the {\it intersection} of two sets:  $A \cap B$?
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B) (5) Let $f : \{1,2,3\} \to \{a,b,c,d,e\}$ be defined by $f(1) = b$, $f(2) = e$ and 
$f(3) = b$.   What is the set $f^{-1}(\{a,b,c\})$?
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