F5.ptx

<exercise>
  <statement>
    <p>
      Apply each of the substitutions <m>u=\frac{y}{t}</m> and
      <m>u=at+by+c</m> to one of the following
      ODEs, and show that each result is separable.
      (Do not fully solve either ODE.)
    </p>
    <ol>
    <xsl:for-each select="odes/*">
      <li><m><xsl:value-of select="ode"/></m></li>
    </xsl:for-each>
    </ol>
  </statement>
  <answer>
    <ol>
    <xsl:for-each select="odes/*">
      <li><m><xsl:value-of select="ode_simp"/></m></li>
    </xsl:for-each>
    </ol>
  </answer>
</exercise>