// Numbas version: exam_results_page_options
{"name": "CA2 (2018/19) Substitution 4 (custom feedback)", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"variables": {"a": {"definition": "random(2..6)", "name": "a", "templateType": "anything", "description": "", "group": "Ungrouped variables"}, "c": {"definition": "random(2..20)", "name": "c", "templateType": "anything", "description": "", "group": "Ungrouped variables"}, "b": {"definition": "random(1..8 except a)", "name": "b", "templateType": "anything", "description": "", "group": "Ungrouped variables"}}, "statement": "<p>Perform the following integration, using&nbsp;the letter $C$ to represent any unknown constants.</p>", "advice": "<p>integration by Susbtitution</p>", "extensions": [], "preamble": {"css": "", "js": ""}, "variable_groups": [], "functions": {}, "name": "CA2 (2018/19) Substitution 4 (custom feedback)", "variablesTest": {"condition": "", "maxRuns": 100}, "tags": [], "metadata": {"licence": "Creative Commons Attribution 4.0 International", "description": "<p>Integration by susbtitution. Use the letter C for the constant.</p>"}, "ungrouped_variables": ["c", "b", "a"], "parts": [{"variableReplacements": [], "vsetRangePoints": 5, "checkVariableNames": false, "showCorrectAnswer": true, "showPreview": true, "expectedVariableNames": [], "checkingType": "absdiff", "scripts": {}, "type": "jme", "prompt": "<p>$\\int \\sin (\\var{c}x+2) \\&nbsp;dx$.</p>\n<p></p>", "marks": "2", "unitTests": [], "answer": "-(1/{c})*cos({c}x+2)+C", "showFeedbackIcon": true, "customMarkingAlgorithm": "malrules:\n  [\n    [\"-(1/{c})*cos({c}x+2)\", \"Almost there! Did you forget to include the integration constant?\"],\n    [\"{c}*cos({c}x+2)+C\", \"It looks like you differentiated rather than integrating.\"],\n    [\"{c}*cos({c}x+2)\", \"It looks like you differentiated rather than integrating.\"],\n    [\"(1/{c})*cos({c}x+2)+C\", \"Double check the rule for integrating $\\\\sin(x)$.\"],\n    [\"(1/{c})*cos({c}x+2)\", \"Double check the rule for integrating $\\\\sin(x)$.\"],\n    [\"-{c}*cos({c}x+2)+C\", \"It looks like you have multiplied by the number in front of $x$. Did you mean to do this?\"],\n    [\"-{c}*cos({c}x+2)\", \"It looks like you have multiplied by the number in front of $x$. Did you mean to do this?\"],\n    [\"-cos({c}x+2)+C\",\"Did you forget to divide by the number in front of $x$?\"],\n    [\"-cos({c}x+2)\",\"Did you forget to divide by the number in front of $x$?\"]\n  ]\n\n\nparsed_malrules: \n    map(\n        [\"expr\":parse(x[0]),\"feedback\":x[1]],\n        x,\n        malrules\n    )\n\nagree_malrules (Do the student's answer and the expected answer agree on each of the sets of variable values?):\n    map(\n        len(filter(not x ,x,map(\n            try(\n                resultsEqual(unset(question_definitions,eval(studentexpr,vars)),unset(question_definitions,eval(malrule[\"expr\"],vars)),settings[\"checkingType\"],settings[\"checkingAccuracy\"]),\n                message,\n                false\n            ),\n            vars,\n            vset\n        )))<settings[\"failureRate\"],\n        malrule,\n        parsed_malrules\n    )\n\nmatched_malrules:\n  filter(x[0],x,zip(agree_malrules,parsed_malrules))\n  \nmalrule_feedback:\n    assert(numericallyCorrect,\n        assert(len(matched_malrules)=0,\n            set_credit(0,matched_malrules[0][1][\"feedback\"])\n        )\n    )\n\nmark:\n    apply(studentExpr);\n    apply(unexpectedVariables);\n    apply(numericallyCorrect);\n    apply(malrule_feedback);\n    apply(failMinLength);\n    apply(failMaxLength);\n    apply(forbiddenStringsPenalty);\n    apply(requiredStringsPenalty)", "vsetRange": [0, 1], "extendBaseMarkingAlgorithm": true, "failureRate": 1, "checkingAccuracy": 0.001, "variableReplacementStrategy": "originalfirst"}], "rulesets": {}, "type": "question", "contributors": [{"name": "Clodagh Carroll", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/384/"}, {"name": "Violeta CIT", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/1030/"}]}]}], "contributors": [{"name": "Clodagh Carroll", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/384/"}, {"name": "Violeta CIT", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/1030/"}]}