How to enter functions - Getting Started - Numbas at mathcentre.ac.uk

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Christian Lawson-Perfect

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Ready to use

7 years, 5 months ago

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Christian Lawson-Perfect 7 years, 5 months ago

Gave some feedback: Ready to use

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Newcastle University Mathematics and Statistics 9 years, 2 months ago

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Name	Status	Author	Last Modified
How to enter functions - Getting Started	Ready to use	Newcastle University Mathematics and Statistics	20/11/2019 14:50
How to enter functions - Getting Started	draft	steve kilgallon	19/09/2016 22:06
Luis's copy of How to enter functions - Getting Started	draft	Luis Hernandez	30/11/2018 01:04
How to enter functions - Getting Started	draft	Xiaodan Leng	10/07/2019 23:14
Bedienung von Numbas: Funktionen eingeben	Ready to use	Ulrich Görtz	13/09/2024 19:33

There are 13 other versions that do you not have access to.

Question statement

FUNCTIONS

The Numbas system recognises all standard functions but you must use brackets for the arguments of the functions, e.g. sin(x) not sinx, ln(a) not lna.
The absolute value function is written abs(a).
$\arcsin(x)$ , $\arccos(x)$ and $\arctan(x)$ are all recognized as the standard inverse trig functions, and you input them as they are written.

Here are some examples for you to try:

(If you want help, press Reveal Answers to see correct inputs in the Advice section.)

Give any introductory information the student needs.

			Name	Type	Generated Value

a	integer	6
c	integer	6
b	integer	3
d	integer	5

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(2..9)

JME function reference

Description

Describe what this variable represents, and list any assumptions made about its value.

Can an exam override the value of this variable?

Generated value: `integer`

→ Used by:

Advice
"Part a)" - prompt
"Part a)" → "Gap 0." - Correct answer
"Part a)" → "Gap 1." - Correct answer
"Part b)" - prompt
"Part b)" → "Gap 1." - Correct answer
"Part c)" - prompt
"Part c)" → "Gap 0." - Correct answer
"Part c)" → "Gap 1." - Correct answer

Parts

Part a) Gap-fill
1. Gap Gap 0. Mathematical expression
  Add
2. Gap Gap 1. Mathematical expression
  Add
Part b) Gap-fill
1. Gap Gap 0. Mathematical expression
  Add
2. Gap Gap 1. Mathematical expression
  Add
Part c) Gap-fill
1. Gap Gap 0. Mathematical expression
  Add
2. Gap Gap 1. Mathematical expression
  Add

Gap-fill

Ask the student a question, and give any hints about how they should answer this part.

Input:

$\sin(\cos(\var{a}x)+\var{b})$ : Gap 0.
$\cos(\sin(\var{b}x)+\var{a})$ : Gap 1.

Advice

Correct inputs for these questions are as follows, although there may be other correct ways of inputting these:

a)

sin(cos({a}x)+{b})
cos(sin({a}x + {b}))

b)

abs((x + {c}) / (x + {d}))
ln(abs((x + {a}) / (x + {d})))

c)

{a}t^({-b})*e^({-c}t)*sin({b}t) + (t + {d}t ^ 3)*e ^ ({c}t)
arctan(({c}y ^ 2 + {d}) / ((y + {a})*(y + {b})))

Give a worked solution to the whole question.

Use this tab to check that this question works as expected.

There was an error which means the tests can't run:

Part	Test	Passed?
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet

This question is used in the following exams:

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How to enter functions - Getting Started

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Christian Lawson-Perfect 7 years, 5 months ago

Newcastle University Mathematics and Statistics 9 years, 2 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

a)

b)

c)

Loading...

Error

How to enter functions - Getting Started

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Christian Lawson-Perfect 7 years, 5 months ago

Newcastle University Mathematics and Statistics 9 years, 2 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

a)

b)

c)

Generated value: `integer`