// Numbas version: finer_feedback_settings
{"name": "Marie's copy of Inverse Laplace transform: irreducible quadratic factor", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"variable_groups": [], "rulesets": {}, "statement": "<p>Having found the partial fraction breakdown:</p>\n<p>\\(Q(s)=\\frac{\\var{A}}{s+\\var{a1}}+\\frac{\\var{B}s+\\var{C}}{s^2+\\simplify{{b1}*2}s+\\var{c1}}\\)</p>", "functions": {}, "metadata": {"licence": "Creative Commons Attribution-NonCommercial 4.0 International", "description": ""}, "name": "Marie's copy of Inverse Laplace transform: irreducible quadratic factor", "parts": [{"scripts": {}, "showCorrectAnswer": true, "showFeedbackIcon": true, "prompt": "<p>Write down the inverse Laplace transform</p>\n<p>\\(q(t)=\\)&nbsp;[[0]]</p>", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"showCorrectAnswer": true, "showpreview": true, "vsetrangepoints": 5, "variableReplacements": [], "checkingaccuracy": 0.001, "scripts": {}, "answer": "{A}*e^(-{a1}*t)+e^(-{b1}*t)({B}*cos({f}*t)+({C}-{B}*{b1})/{f}*sin({f}*t))", "marks": "2", "vsetrange": [0, 1], "showFeedbackIcon": true, "variableReplacementStrategy": "originalfirst", "type": "jme", "checkingtype": "absdiff", "expectedvariablenames": [], "checkvariablenames": false}], "type": "gapfill", "marks": 0}], "advice": "<p>\\(Q(s)=\\frac{\\var{A}}{s+\\var{a1}}+\\frac{\\var{B}s+\\var{C}}{s^2+\\simplify{{b1}*2}s+\\var{c1}}\\)</p>\n<p>\\(Q(s)=\\frac{\\var{A}}{s+\\var{a1}}+\\frac{\\var{B}s+\\var{C}}{(s+\\var{b1})^2+\\simplify{{c1}-{b1}^2}}\\)</p>\n<p>\\(Q(s)=\\frac{\\var{A}}{s+\\var{a1}}+\\frac{\\var{B}(s+\\var{b1})-\\simplify{{B}*{b1}-{C}}}{(s+\\var{b1})^2+\\simplify{{c1}-{b1}^2}}\\)</p>\n<p>\\(q(t)=\\var{A}e^{\\var{a1}t}+\\var{B}e^{-\\var{b1}t}cos\\left(\\sqrt{\\simplify{{c1}-{b1}^2}}t\\right)+\\frac{-\\simplify{{B}*{b1}-{C}}}{\\sqrt{\\simplify{{c1}-{b1}^2}}}e^{-\\var{b1}t}sin\\left(\\sqrt{\\simplify{{c1}-{b1}^2}}t\\right)\\)</p>", "extensions": [], "preamble": {"js": "", "css": ""}, "tags": [], "variables": {"A": {"description": "", "name": "A", "templateType": "randrange", "group": "Ungrouped variables", "definition": "random(2..10#1)"}, "f": {"description": "", "name": "f", "templateType": "randrange", "group": "Ungrouped variables", "definition": "random(2..8#1)"}, "b1": {"description": "", "name": "b1", "templateType": "randrange", "group": "Ungrouped variables", "definition": "random(6..12#1)"}, "C": {"description": "", "name": "C", "templateType": "randrange", "group": "Ungrouped variables", "definition": "random(2..14#1)"}, "a1": {"description": "", "name": "a1", "templateType": "randrange", "group": "Ungrouped variables", "definition": "random(2..6#1)"}, "B": {"description": "", "name": "B", "templateType": "randrange", "group": "Ungrouped variables", "definition": "random(2..10#1)"}, "c1": {"description": "", "name": "c1", "templateType": "anything", "group": "Ungrouped variables", "definition": "{b1}^2+{f}^2"}}, "ungrouped_variables": ["A", "a1", "B", "b1", "C", "c1", "f"], "variablesTest": {"condition": "", "maxRuns": 100}, "type": "question", "contributors": [{"name": "Frank Doheny", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/789/"}, {"name": "Marie Nicholson", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/1799/"}]}]}], "contributors": [{"name": "Frank Doheny", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/789/"}, {"name": "Marie Nicholson", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/1799/"}]}