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Tamsin Smith 7 months, 4 weeks ago

Published this.

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Tamsin Smith 10 months, 1 week ago

Created this as a copy of Matrices: Basics 02.

Name	Status	Author	Last Modified
Matrices: Basics 01	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Basics 02	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Basics 03	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Basics 04	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Add & Subtract 01	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Add & Subtract 03	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Add & Subtract 02	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Add & Subtract 04	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Scalar Multiple 01	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Scalar Multiple 02	Needs to be tested	Michael Proudman	07/12/2021 08:24
Matrices: Scalar Multiple 03	Needs to be tested	Michael Proudman	07/12/2021 08:24
Subtraction of Matrices	draft	Tamsin Smith	17/09/2024 13:13
Order of a Matrix	draft	Tamsin Smith	17/09/2024 12:41
Choosing an Element	draft	Tamsin Smith	17/09/2024 12:40
Finding the Transpose	draft	Tamsin Smith	17/09/2024 13:21
Scalar Multiple of a Matrix	draft	Tamsin Smith	17/09/2024 13:12
Addition and Subtraction with Scalar Multiples	draft	Tamsin Smith	17/09/2024 12:46
Addition of Matrices	draft	Tamsin Smith	16/09/2024 12:24

There are 9 other versions that do you not have access to.

Question statement

Finding Elements of a Matrix

For each of the given matrices, determine the value of the specific element

Give any introductory information the student needs.

			Name	Type	Generated Value

n1	integer	1
m1	integer	1
A	matrix	matrix([9])
e1	number	9

			Name	Type	Generated Value

n2	integer	3
m2	integer	2
B	matrix	matrix([9,-1],[7,7],[8,-7])
E2	number	-7

			Name	Type	Generated Value

n3	integer	2
m3	integer	3
C	matrix	matrix([8,8,-8],[9,7,0])
E3	number	0
E4	number	8

			Name	Type	Generated Value

n4	integer	1
m4	integer	1
D	matrix	matrix([5])

			Name	Type	Generated Value

n5	integer	3
m5	integer	1
EE	matrix	matrix([-1],[-4],[0])

			Name	Type	Generated Value

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(1..(m3-1) except m3)

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`

← Depends on:

This variable doesn't seem to be used anywhere.

Parts

Gap-fill
1. Gap Gap 0. Number entry
  Add
2. Gap Gap 1. Number entry
  Add
3. Gap Gap 2. Number entry
  Add
4. Gap Gap 3. Number entry
  Add

Gap-fill

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

Consider the matrices:

$A=\var{A}, \ \ B=\var{B}, \ \ C=\var{C}$

Give the values of the following elements:

$a_{\var{n1}\var{m1}}=$ Gap 0.

$b_{\var{n2}\var{m2}}=$ Gap 1.

$c_{\var{n3}\var{m3}}=$ Gap 2.

$c_{\var{n4}\var{m4}}=$ Gap 3.

Advice

We are presented with random matrices and asked to identify certain elements of those matrices.

What you need to remember is:

In matrix $A$ the element in row $i$ and column $j$ is denoted by $a_{ij}$ .

In easier terms, in the subscript the numbers represent row then column.

So given the matrix $A=\var{A}$

$a_{\var{n1}\var{m1}}$ is the element in row $\var{n1}$ and column $\var{m1}$ . Therefore, $a_{\var{n1}\var{m1}}=\var{E1}$

given the matrix $B=\var{B}$

$b_{\var{n2}\var{m2}}$ is the element in row $\var{n2}$ and column $\var{m2}$ . Therefore, $b_{\var{n2}\var{m2}}=\var{E2}$

given the matrix $C=\var{C}$

$c_{\var{n3}\var{m3}}$ is the element in row $\var{n3}$ and column $\var{m3}$ . Therefore, $c_{\var{n3}\var{m3}}=\var{E3}$

$c_{\var{n4}\var{m4}}$ is the element in row $\var{n4}$ and column $\var{m4}$ . Therefore, $c_{\var{n4}\var{m4}}=\var{E4}$

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
Number entry
Number entry		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Number entry
Number entry		Hasn't run yet

This question is used in the following exam:

Representing A Matrix by Tamsin Smith in Tamsin's workspace.

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Error

Choosing an Element

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Tamsin Smith 7 months, 4 weeks ago

Tamsin Smith 10 months, 1 week ago

Finding Elements of a Matrix

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

Loading...

Error

Choosing an Element

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Tamsin Smith 7 months, 4 weeks ago

Tamsin Smith 10 months, 1 week ago

Finding Elements of a Matrix

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

Generated value: `integer`