Sums of matrices (same as WBQ 1.22)

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Julia Goedecke

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Julia Goedecke

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4 years, 7 months ago

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Julia Goedecke 4 years, 7 months ago

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Julia Goedecke 4 years, 7 months ago

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Julia Goedecke 4 years, 7 months ago

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Question statement

Let $A=\var{A}$ , $B=\var{B}$ , $C=\var{C}$ , $D=\var{D}$ , $E=\var{G}$ , $F=\var{F}$ , and $\lambda=\var{lambda}$ .

Give any introductory information the student needs.

			Name	Type	Generated Value

A	matrix	matrix([-1,2],[0,1])
B	matrix	matrix([1,3],[-1,2])
C	matrix	matrix([0,1,-2],[1,2,3])
D	matrix	matrix([0,0,0],[0,0,0])
G	vector	vector(1,-3,-3)
F	vector	vector(-1,3,2)
lambda	integer	3

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Data type

Value

xxxxxxxxxx
 
matrix([-1,2],[0,1])

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Generated value: `matrix`

matrix([-1,2],[0,1])

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Statement
"Calculate the sums" → "A+B" - Correct answer

Parts

Explore mode options

Which sums are possible? Gap-fill
1. Gap Match choices with answers
  Add
Calculate the sums Gap-fill
1. Gap A+B Matrix entry
  Add
2. Gap C+D Matrix entry
  Add
3. Gap E+F Matrix entry
  Add
Scalar multiplication Gap-fill
1. Gap lambda B Matrix entry
  1. Alt Unnamed alternative
  Add
2. Gap lambda C Matrix entry
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3. Gap lambda D Matrix entry
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4. Gap lambda E Matrix entry
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Advice

We can add matrices which have the same size, so the same number of rows and columns. So $A$ and $B$ match together, $C$ and $D$ , and $E$ and $F$ . We can also add any matrix to itself.

When we add matrices, we add entry by entry. You can see the answers revealed above. (You may have to click back to the relevant part with the menu at the top.)

Any matrix can be multiplied by a scalar: every entry is multiplied individually by the scalar. You can see the answers revealed above.

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Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Julia Goedecke 4 years, 7 months ago

Julia Goedecke 4 years, 7 months ago

Julia Goedecke 4 years, 7 months ago

Julia Goedecke 4 years, 7 months ago

Error in variable testing condition

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Generated value: `matrix`

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Sums of matrices (same as WBQ 1.22)

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Julia Goedecke 4 years, 7 months ago

Julia Goedecke 4 years, 7 months ago

Julia Goedecke 4 years, 7 months ago

Julia Goedecke 4 years, 7 months ago

Error in variable testing condition

Error

Warning

Generated value: matrix

Parts

Objectives

Penalties

Generated value: `matrix`