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<quiz>
  <question type="stack">
    <name>
      <text>10.2.7 (Second deriv of quartic)</text>
    </name>
    <questiontext format="html">
      <text><![CDATA[<p>Find the second the derivative of the function \(f(x) = {@f@}\).</p><p>\(f''(x)&nbsp; = \) [[input:ans1]]. [[validation:ans1]]</p>]]></text>
    </questiontext>
    <generalfeedback format="html">
      <text><![CDATA[<p>Given \(f(x) = {@f@}\), we find that \[f'(x) = {@df@}\]so\[f''(x) = {@ta1@}.\]<br></p>]]></text>
    </generalfeedback>
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    <penalty>0.1</penalty>
    <hidden>0</hidden>
    <idnumber/>
    <stackversion>
      <text>2020081700</text>
    </stackversion>
    <questionvariables>
      <text>a:rand_with_prohib(-5,5,[0]);
b:rand_with_step(-5,5,1);
c:rand_with_step(-5,5,1);
d:rand_with_step(-5,5,1);
e:rand_with_step(-5,5,1);
f:a*x^4 + b*x^3+c*x^2+d*x+e;
df:diff(f,x);
ta1:diff(df,x);</text>
    </questionvariables>
    <specificfeedback format="html">
      <text>[[feedback:prt1]]</text>
    </specificfeedback>
    <questionnote format="moodle_auto_format">
      <text>\(f(x) = {@f@}\) so \(f''(x) = {@ta1@}\).</text>
    </questionnote>
    <questiondescription format="moodle_auto_format">
      <text/>
    </questiondescription>
    <questionsimplify>1</questionsimplify>
    <assumepositive>0</assumepositive>
    <assumereal>0</assumereal>
    <prtcorrect format="html">
      <text><![CDATA[<span style="font-size: 1.5em; color:green;"><i class="fa fa-check"></i></span> Correct answer, well done.]]></text>
    </prtcorrect>
    <prtpartiallycorrect format="html">
      <text><![CDATA[<span style="font-size: 1.5em; color:orange;"><i class="fa fa-adjust"></i></span> Your answer is partially correct.]]></text>
    </prtpartiallycorrect>
    <prtincorrect format="html">
      <text><![CDATA[<span style="font-size: 1.5em; color:red;"><i class="fa fa-times"></i></span> Incorrect answer.]]></text>
    </prtincorrect>
    <decimals>.</decimals>
    <scientificnotation>*10</scientificnotation>
    <multiplicationsign>none</multiplicationsign>
    <sqrtsign>1</sqrtsign>
    <complexno>i</complexno>
    <inversetrig>cos-1</inversetrig>
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      <name>ans1</name>
      <type>algebraic</type>
      <tans>ta1</tans>
      <boxsize>15</boxsize>
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      <requirelowestterms>0</requirelowestterms>
      <checkanswertype>0</checkanswertype>
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      <options/>
    </input>
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        <text/>
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        <name>0</name>
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        <answertest>Diff</answertest>
        <sans>ans1</sans>
        <tans>ta1</tans>
        <testoptions>x</testoptions>
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        <trueanswernote>prt1-1-T</trueanswernote>
        <truefeedback format="html">
          <text/>
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        <falsescoremode>=</falsescoremode>
        <falsescore>0.0000000</falsescore>
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        <falsenextnode>-1</falsenextnode>
        <falseanswernote>prt1-1-F</falseanswernote>
        <falsefeedback format="html">
          <text/>
        </falsefeedback>
      </node>
    </prt>
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    <qtest>
      <testcase>1</testcase>
      <description/>
      <testinput>
        <name>ans1</name>
        <value>ta1</value>
      </testinput>
      <expected>
        <name>prt1</name>
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        <expectedpenalty>0.0000000</expectedpenalty>
        <expectedanswernote>prt1-1-T</expectedanswernote>
      </expected>
    </qtest>
  </question>
</quiz>
