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  <question type="description">
    <name>
      <text>1.1.6.2 Combining Numbers Together</text>
    </name>
    <questiontext format="html">
      <text><![CDATA[<h4 class="HELM_example">Example</h4>
<p>Write out explicitly </p>
<ol class="HELM_parts_inline">
<li>\(\sum_{k=1}^{3}1\)</li>
<li>\(\sum_{k=0}^{4}2\)</li>
</ol>
<h4 class="HELM_solution">Solution</h4>
<ol class="HELM_parts">
<li>Here k does not appear explicitly in the terms to be added. This means add the constant 1, three times.
<p>\(\qquad \sum_{k=1}^{3}1 = 1 + 1 + 1 = 3\)<p>
<p>In general \(\sum_{k=1}^{n}1 = n\)
</li>
<li> Here \(k\) starts at zero so there are \(n + 1\) terms where \(n = 4\):
<p>\(\qquad \sum_{k=0}^{4}2 = 2 + 2 + 2 + 2 + 2 = 10\)<p>
</li>
</ol>]]></text>
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