How to enter algebraic fractions - Getting Started

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Xiaodan Leng 5 years, 8 months ago

Created this as a copy of Hussam's copy of Hussam's copy of How to enter algebraic fractions - Getting Started.

Name	Status	Author	Last Modified
How to enter algebraic fractions - Getting Started	Ready to use	Newcastle University Mathematics and Statistics	20/11/2019 14:50
How to enter algebraic fractions - Getting Started	draft	steve kilgallon	19/09/2016 22:06
Hussam's copy of How to enter algebraic fractions - Getting Started	draft	Hussam Muhamedsalih	21/06/2018 11:30
Hussam's copy of Hussam's copy of How to enter algebraic fractions - Getting Started	Ready to use	Hussam Muhamedsalih	21/06/2018 11:33
Luis's copy of How to enter algebraic fractions - Getting Started	draft	Luis Hernandez	30/11/2018 17:31
How to enter algebraic fractions - Getting Started	draft	Xiaodan Leng	11/07/2019 00:01
Bedienung von Numbas: Brüche eingeben	Ready to use	Ulrich Görtz	13/09/2024 19:29

There are 16 other versions that do you not have access to.

Question statement

Ratios of Algebraic Expressions.

By this we mean expressions of the form $\displaystyle \frac{p(x)}{q(x)}$ where $p(x)$ and $q(x)$ are algebraic expressions.

If you want to input such an expression into the system you HAVE TO BE CAREFUL AND USE BRACKETS otherwise mistakes will occur.

Once again, the box displaying your input in mathematical notation beside the input boxes in parts 2, 3 and 4 is very useful as it shows what the system thinks you have entered.

For complicated expressions this is essential as you can check you have written what you really meant.

Give any introductory information the student needs.

			Name	Type	Generated Value

a	integer	8
c	integer	3
b	integer	11
d	integer	7

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(2..16#2)

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:

This variable doesn't seem to be used anywhere.

Parts

Part a) Gap-fill
1. Gap Choose several from a list
  Add
Part b) Gap-fill
1. Gap Mathematical expression
  Add
Part c) Gap-fill
1. Gap Mathematical expression
  Add
Part d) Gap-fill
1. Gap Mathematical expression
  Add

Gap-fill

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

Examples

Suppose we wanted to input the expression $\displaystyle \frac{\var{a}+\var{b}x}{\var{c}+\var{d}y}$ into the system.

Which of the following input expressions are incorrect?

Unnamed gap

Choose the incorrect input(s): (You lose 3 marks if you choose the wrong one!)

If you click on Submit part, then on Show feedback, you will be given more detail on your choices.

You can click on Reveal at the top of the window to see solutions, but it's best to work these through yourself. Remember you can always redo the question by clicking on Try another question like this one at the bottom.

Advice

a) The correct input is ({a}+{b}x)/({c}+{d}y) - the rest are incorrect and you should have ticked those.

b) A correct input is ({b} + {a}y) / ({c} + {d}z). Also correct is ({a}y+{b}) / ({c} + {d}z) etc.

c) A correct input is ({d}z + {b}) / ((x + {a})*(y + {c})).

Note the denominator (the bottom of the ratio) has to have two brackets, i.e. ((x + {a})*(y + {c})) as otherwise the expression ({d}z + {b}) / (x + {a})*(y + {c}) is seen by the system as $\displaystyle \left(\simplify[std]{({d} * z + {b}) / (x + {a})}\right) (y + \var{c})$

d) A correct input is ({a} -({b}x + {c})*e ^ ( -{2}x)) / ((x + {2*b})*(y -{3*d}))

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
Choose several from a list
Choose several from a list		Hasn't run yet
Gap-fill
Gap-fill		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
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet

This question is not used in any exams.

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How to enter algebraic fractions - Getting Started

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Xiaodan Leng 5 years, 8 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

Loading...

Error

How to enter algebraic fractions - Getting Started

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Xiaodan Leng 5 years, 8 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

Generated value: `integer`