
        </ul>
      </div>
    </div>
    <div class="solutions">
      <a
        href=""
        data-knowl=""
        class="id-ref hint-knowl original"
        data-refid="hk-hint-1"
        id="hint-1"
        ><span class="type">Hint</span><span class="period">.</span></a
      >
      <div class="hidden-content tex2jax_ignore" id="hk-hint-1">
        <div class="hint solution-like">
          <div class="para" id="p-4">
            <span class="process-math">\(P_n\text{,}\)</span> the vector space
 