D1.ptx

<exercise>
  <statement>
      <p>
      Illustrustrate both of the following integrals. Then explain how
        to compute each.
      </p>
      <me>
          \int_{<xsl:value-of select="b"/>}^{<xsl:value-of select="c"/>}
          <xsl:value-of select="d_integrand"/>
          \,dt
          \hspace{2em}
          \int_{<xsl:value-of select="b"/>}^{<xsl:value-of select="c"/>}
          <xsl:value-of select="u_integrand"/>
          \,dt
      </me>
  </statement>
  <answer>
      <me>
          \int_{<xsl:value-of select="b"/>}^{<xsl:value-of select="c"/>}
          <xsl:value-of select="d_integrand"/>
          \,dt = <xsl:value-of select="d_int_value"/>
          \hspace{2em}
          \int_{<xsl:value-of select="b"/>}^{<xsl:value-of select="c"/>}
          <xsl:value-of select="u_integrand"/>
          \,dt = <xsl:value-of select="u_int_value"/>
      </me>
  </answer>
</exercise>