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  <question type="multichoice">
    <name>
      <text>Which method to solve</text>
    </name>
    <questiontext format="html">
      <text><![CDATA[<p>Which method would you use to solve the following differential equation?</p><p>\[\displaystyle  \frac{1}{y}\frac{\mathrm{d}y}{\mathrm{d}x} =\frac{e^{-x^2}}{y}-2x,\quad y(0)=1. \]</p>]]></text>
    </questiontext>
    <generalfeedback format="html">
      <text/>
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    <defaultgrade>1</defaultgrade>
    <penalty>0.3333333</penalty>
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    <idnumber/>
    <single>true</single>
    <shuffleanswers>true</shuffleanswers>
    <answernumbering>abc</answernumbering>
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    <correctfeedback format="html">
      <text><![CDATA[<p>Your answer is correct.</p>]]></text>
    </correctfeedback>
    <partiallycorrectfeedback format="html">
      <text><![CDATA[<p>Your answer is partially correct.</p>]]></text>
    </partiallycorrectfeedback>
    <incorrectfeedback format="html">
      <text><![CDATA[<p>Your answer is incorrect.</p>]]></text>
    </incorrectfeedback>
    <shownumcorrect/>
    <answer fraction="0" format="html">
      <text><![CDATA[<p>Linear ODE, so use the substitution \(x(t)=e^{\lambda t}\).</p>]]></text>
      <feedback format="html">
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      </feedback>
    </answer>
    <answer fraction="0" format="html">
      <text><![CDATA[<p>Laplace Transforms.</p>]]></text>
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      </feedback>
    </answer>
    <answer fraction="100" format="html">
      <text><![CDATA[<p>Integrating factor.</p>]]></text>
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    </answer>
    <answer fraction="0" format="html">
      <text><![CDATA[<p>It is exact, so reformulate and integrate directly.</p>]]></text>
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      </feedback>
    </answer>
    <answer fraction="0" format="html">
      <text><![CDATA[<p>None of these methods - it has no solution in terms of elementary functions.</p>]]></text>
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