Trace of a matrix (WBQ 1.21 randomized)

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Julia Goedecke

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From users who are members of Linear Algebra 1st year :

Tatiana Tyukina	said	Ready to use	4 years, 8 months ago
Julia Goedecke	said	Needs to be tested	4 years, 8 months ago

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Tatiana Tyukina 4 years, 8 months ago

Gave some feedback: Ready to use

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Julia Goedecke 4 years, 8 months ago

Published this.

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Julia Goedecke 4 years, 8 months ago

Gave some feedback: Needs to be tested

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Julia Goedecke 4 years, 8 months ago

Gave some feedback: Has some problems

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Julia Goedecke 4 years, 8 months ago

Created this as a copy of Trace of a matrix (same as WBQ 1.21).

Name	Status	Author	Last Modified
Trace of a matrix (same as WBQ 1.21)	Ready to use	Julia Goedecke	25/08/2021 12:57
Trace of a matrix (WBQ 1.21 randomized)	Ready to use	Julia Goedecke	25/08/2021 12:57

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Question statement

Calculate the trace of the following matrix.

Give any introductory information the student needs.

			Name	Type	Generated Value

A	matrix	matrix([-12,-10],[-11,-2])
trA	number	-14
n	integer	2
diagonals	list	[ -12, -2 ]

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
matrix(repeat(repeat(random(-20..20),n),n))

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: `matrix`

matrix([-12,-10],[-11,-2])

← Depends on:

→ Used by:

diagonals

This variable doesn't seem to be used anywhere.

Parts

Gap-fill
1. Gap Number entry
  Add

Gap-fill

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

$\mathrm{tr}\var{A}=$ Unnamed gap

Advice

The trace of a square matrix is the sum of the diagonal elements.

$\mathrm{tr}\var{A}=\var{A[0][0]}+\var{A[1][1]}=\var{trA}$ . $\mathrm{tr}\var{A}=\var{A[0][0]}+\var{A[1][1]}+\var{A[2][2]}=\var{trA}$ . $\mathrm{tr}\var{A}=\var{A[0][0]}+\var{A[1][1]}+\var{A[2][2]}+\var{A[3][3]}=\var{trA}$ . $\mathrm{tr}\var{A}=\var{A[0][0]}+\var{A[1][1]}+\var{A[2][2]}+\var{A[3][3]}+\var{A[4][4]}=\var{trA}$ .

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Part	Test	Passed?
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Gap-fill		Hasn't run yet
Number entry
Number entry		Hasn't run yet

This question is used in the following exam:

Matrices Intro by Julia Goedecke in Linear Algebra 1st year.

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Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Checkpoint description

Tatiana Tyukina 4 years, 8 months ago

Julia Goedecke 4 years, 8 months ago

Julia Goedecke 4 years, 8 months ago

Julia Goedecke 4 years, 8 months ago

Julia Goedecke 4 years, 8 months ago

Error in variable testing condition

Error

Warning

Generated value: `matrix`

Parts

Gap-fill

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Trace of a matrix (WBQ 1.21 randomized)

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Tatiana Tyukina 4 years, 8 months ago

Julia Goedecke 4 years, 8 months ago

Julia Goedecke 4 years, 8 months ago

Julia Goedecke 4 years, 8 months ago

Julia Goedecke 4 years, 8 months ago

Error in variable testing condition

Error

Warning

Generated value: matrix

Parts

Gap-fill

Generated value: `matrix`