// Numbas version: finer_feedback_settings
{"name": "Morten's copy of Numbas demo: JME part", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"parts": [{"scripts": {}, "steps": [{"showCorrectAnswer": true, "scripts": {}, "type": "information", "variableReplacementStrategy": "originalfirst", "marks": 0, "variableReplacements": [], "prompt": "<p>The derivative of $x^n$ is given by the following:</p>\n<p>\\[ \\frac{\\mathrm{d}}{\\mathrm{d}x}(x^n) = n \\times x^{n-1} \\]</p>\n<p>Enter the derivatives of each of the three terms in $f(x)$:</p>"}, {"expectedvariablenames": [], "checkvariablenames": false, "showpreview": true, "variableReplacementStrategy": "originalfirst", "marks": 1, "variableReplacements": [], "prompt": "<p>$\\frac{\\mathrm{d}}{\\mathrm{d}x}(\\simplify{{coefficients[2]}*x^{powers[2]}}) =$</p>", "checkingtype": "absdiff", "scripts": {}, "type": "jme", "vsetrangepoints": 5, "showCorrectAnswer": true, "answer": "{coefficients[2]*powers[2]}*x^{powers[2]-1}", "vsetrange": [0, 1], "checkingaccuracy": 0.001}, {"expectedvariablenames": [], "checkvariablenames": false, "showpreview": true, "variableReplacementStrategy": "originalfirst", "marks": 1, "variableReplacements": [], "prompt": "<p>$\\frac{\\mathrm{d}}{\\mathrm{d}x}(\\simplify{{coefficients[1]}*x^{powers[1]}}) =$</p>", "checkingtype": "absdiff", "scripts": {}, "type": "jme", "vsetrangepoints": 5, "showCorrectAnswer": true, "answer": "{coefficients[1]*powers[1]}*x^{powers[1]-1}", "vsetrange": [0, 1], "checkingaccuracy": 0.001}, {"expectedvariablenames": [], "checkvariablenames": false, "showpreview": true, "variableReplacementStrategy": "originalfirst", "marks": 1, "variableReplacements": [], "prompt": "<p>$\\frac{\\mathrm{d}}{\\mathrm{d}x}(\\simplify{{coefficients[0]}*x^{powers[0]}}) =$</p>", "checkingtype": "absdiff", "scripts": {}, "type": "jme", "vsetrangepoints": 5, "showCorrectAnswer": true, "answer": "{coefficients[0]*powers[0]}*x^{powers[0]-1}", "vsetrange": [0, 1], "checkingaccuracy": 0.001}], "type": "gapfill", "stepsPenalty": "1", "variableReplacementStrategy": "originalfirst", "gaps": [{"checkvariablenames": false, "showpreview": true, "variableReplacementStrategy": "originalfirst", "marks": "4", "variableReplacements": [], "checkingtype": "absdiff", "scripts": {}, "type": "jme", "vsetrangepoints": 5, "showCorrectAnswer": true, "answer": "{coefficients[2]*powers[2]}*x^{powers[2]-1} + {coefficients[1]*powers[1]}*x^{powers[1]-1} + {coefficients[0]*powers[0]}*x^{powers[0]-1}", "vsetrange": [0, 1], "expectedvariablenames": [], "checkingaccuracy": 0.001}], "showCorrectAnswer": true, "marks": 0, "variableReplacements": [], "prompt": "<p>Differentiate the following function.</p>\n<p>\\[ f(x) = \\simplify[all,!noLeadingMinus]{ {coefficients[2]}*x^{powers[2]} + {coefficients[1]}*x^{powers[1]} +&nbsp;{coefficients[0]}*x^{powers[0]}&nbsp;} \\]</p>\n<p>$\\frac{\\mathrm{d}f}{\\mathrm{d}x} = $&nbsp;[[0]]</p>"}], "variablesTest": {"condition": "", "maxRuns": 100}, "metadata": {"description": "", "licence": "Creative Commons Attribution 4.0 International"}, "ungrouped_variables": ["num_terms", "powers", "coefficients"], "advice": "<p>The derivative of $x^n$ is given by the following:</p>\n<p>\\[ \\frac{\\mathrm{d}}{\\mathrm{d}x}(x^n) = n \\times x^{n-1} \\]</p>\n<p>We can compute the derivative of $f(x)$ by computing the derivatives of each of the three terms, and then adding them together.</p>\n<p>\\begin{align}<br/>\\frac{\\mathrm{d}}{\\mathrm{d}x}(\\simplify{{coefficients[2]}*x^{powers[2]}}) &amp;= \\simplify[basic]{{powers[2]}*{coefficients[2]}*x^({powers[2]}-1)} \\\\<br/>&amp;= \\simplify{{coefficients[2]*powers[2]}*x^{powers[2]-1}}<br/>\\end{align}</p>\n<p>\\begin{align}<br/>\\frac{\\mathrm{d}}{\\mathrm{d}x}(\\simplify{{coefficients[1]}*x^{powers[1]}}) &amp;= \\simplify[basic]{{powers[1]}*{coefficients[1]}*x^({powers[1]}-1)} \\\\<br/>&amp;= \\simplify{{coefficients[1]*powers[1]}*x^{powers[1]-1}}<br/>\\end{align}</p>\n<p data-jme-visible=\"powers[0]=0\">The derivative of a constant is $0$. So,</p>\n<p data-jme-visible=\"powers[0]=0\">\\[ \\frac{\\mathrm{d}}{\\mathrm{d}x}(\\var{coefficients[0]}) = 0 \\]</p>\n<p data-jme-visible=\"powers[0]&lt;&gt;0\">\\begin{align}<br/>\\frac{\\mathrm{d}}{\\mathrm{d}x}(\\simplify{{coefficients[0]}*x^{powers[0]}}) &amp;= \\simplify[basic]{{powers[0]}*{coefficients[0]}*x^({powers[0]}-1)} \\\\<br/>&amp;= \\simplify{{coefficients[0]*powers[0]}*x^{powers[0]-1}}<br/>\\end{align}</p>\n<p>Hence,</p>\n<p>\\[ \\frac{\\mathrm{d}f}{\\mathrm{d}x} = \\simplify{&nbsp;{coefficients[2]*powers[2]}*x^{powers[2]-1} + {coefficients[1]*powers[1]}*x^{powers[1]-1} + {coefficients[0]*powers[0]}*x^{powers[0]-1} } \\]</p>", "variable_groups": [], "extensions": [], "preamble": {"js": "", "css": ""}, "variables": {"num_terms": {"group": "Ungrouped variables", "templateType": "anything", "definition": "3", "description": "", "name": "num_terms"}, "coefficients": {"group": "Ungrouped variables", "templateType": "anything", "definition": "repeat(random(-10..10 except 0),num_terms)", "description": "", "name": "coefficients"}, "powers": {"group": "Ungrouped variables", "templateType": "anything", "definition": "sort(shuffle(list(0..8))[0..3])", "description": "", "name": "powers"}}, "tags": [], "type": "question", "statement": "<p>Numbas&nbsp;is really good at creating and marking randomised maths questions. In this question,&nbsp;you're given a random polynomial to differentiate.</p>\n<p>Notice how Numbas automatically simplifies the&nbsp;mathematical expressions so they look as if a human wrote them.</p>\n<p><em><a href=\"https://numbas.mathcentre.ac.uk/question/8271/numbas-demo-jme-part/\">See this question in the public editor</a></em></p>", "showQuestionGroupNames": false, "rulesets": {}, "functions": {}, "name": "Morten's copy of Numbas demo: JME part", "question_groups": [{"pickingStrategy": "all-ordered", "pickQuestions": 0, "name": "", "questions": []}], "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}, {"name": "Morten Sorensen", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/3103/"}]}]}], "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}, {"name": "Morten Sorensen", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/3103/"}]}