// Numbas version: finer_feedback_settings {"name": "Question 17 function", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"functions": {}, "ungrouped_variables": ["x", "a"], "name": "Question 17 function", "tags": [], "preamble": {"css": "", "js": ""}, "advice": "

a) In the first part, the function takes the value $\\var{a}$ as input, and returns $\\var{2*a}$, the value multiplied by $2$.

\n

b) In the second part, the function takes $y = \\var{2*a}$ as input (set in part a) and again returns the value multiplied by $2$.

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What is the value of $y$?

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{2*x}

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2

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{2*a}

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{x}

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What is the value of $z$?

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{4*a}

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{4*x}

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{2*x}

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{2*a}

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> x = {x}
> fun1 = function(x) { 
+ return(2*x) 
+ }
> (y= fun1({a}))
> (z= fun1(y))
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