<p>$\xi =\{x:x$ is an integer and $2\le x\le 20\}$</p>
<p>$A = \{x : x \text{ is a factor of } 12\}$</p>
<p>$B = \{x : x \text{ is divisible by } 3\}$</p>
<p style="margin-top: 1.5rem">List the elements of</p>
<ol class="abc-list"><li><div class="list-item-paragraph">$\xi$,</div></li><li><div class="list-item-paragraph">$A'$,</div></li><li><div class="list-item-paragraph">$B'$.</div></li></ol>

$\xi =\{x:x$ is an integer and $2\le x\le 20\}$

$A = \{x : x \text{ is a factor of } 12\}$

$B = \{x : x \text{ is divisible by } 3\}$

Set Notation: Defining the Universal Set $(\mathcal{E})$ and Subsets

Set Notation: Defining the Universal Set $(\mathcal{E})$ and Subsets

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