V7.ptx

<exercise>
  <statement>
    <p>Consider the subspace <me>W=\operatorname{span} <xsl:value-of select="vlist"/>.</me>
    </p>
    <ol>
        <li> Explain how to find a basis of <m>W</m>.</li>
        <li> Explain how to find the dimension of <m>W</m>.</li>
    </ol>
  </statement>
  <answer>
      <p><me>\operatorname{RREF}<xsl:value-of select="matrix"/>=<xsl:value-of select="rref"/></me></p>
     <ol>
          <li>A basis of <m>W</m> is <m><xsl:value-of select="basis"/></m>.</li>
          <li>The dimension of <m>W</m> is <m><xsl:value-of select="dimension"/></m>.</li>
      </ol>
  </answer>
</exercise>