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Question 1
30005

Let \(\xi {\rm{ = }}\left\{ {1,2,3,4,5} \right\},{\rm{ }}A = \left\{ {1,3,4} \right\},{\rm{ }}B = \left\{ {1,2} \right\}\), by using a Venn diagram or otherwise, list \(A' \cap B'\)

\(A' \cap B' = \{ 5\} \)

$$
\begin{align}
&\text{From }\xi\\
&A^{\prime}=\{2,5\}, B^{\prime}=\{3,4,5\} \\
&\therefore A^{\prime} \cap B^{\prime}=\{5\}
\end{align}
$$
 

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