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Considerem les matrius <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»A«/mi»«mo»=«/mo»«mi»#A«/mi»«/math»</span> i <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»B«/mi»«mo»=«/mo»«mi»#B«/mi»«/math»</span>. Marca les afirmacions que siguin certes: <br />
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a., b., c., ...
A., B., C., ...
1., 2., 3., ...
i., ii., iii., ...
I., II., III., ...
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Algorithm
Choice 1
Answer
El producte A · B no es pot fer ja que les matrius han de tenir les mateixes dimensions
Grade
None
100%
90%
83.33333%
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66.66667%
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16.66667%
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Feedback
Recorda que dues matrius es poden multiplicar si el nombre de columnes de la primera és igual al nombre de files de la segona. Fixa't que la matriu A té #b columnes i la matriu B té #b files .
Choice 2
Answer
No podem calcular la matriu resultant de A + B
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
30%
25%
20%
16.66667%
14.28571%
12.5%
11.11111%
10%
5%
-5%
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-11.11111%
-12.5%
-14.28571%
-16.66667%
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-83.33333%
-90%
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Feedback
Molt bé. Per poder sumar dues matrius han de tenir la mateixa dimensió.
Choice 3
Answer
Podem calcular A · B i la matriu resultant és una matriu de dimensió #b x #b
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
30%
25%
20%
16.66667%
14.28571%
12.5%
11.11111%
10%
5%
-5%
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-11.11111%
-12.5%
-14.28571%
-16.66667%
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-66.66667%
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Feedback
La matriu resultant d'un producte A · B tindrà el mateix nombre de files que la matriu A i el mateix nombre de columnes que la matriu B.
Choice 4
Answer
Podem calcular A · B i la matriu resultant és una matriu de dimensió #a x #a
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
30%
25%
20%
16.66667%
14.28571%
12.5%
11.11111%
10%
5%
-5%
-10%
-11.11111%
-12.5%
-14.28571%
-16.66667%
-20%
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-33.33333%
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-66.66667%
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-83.33333%
-90%
-100%
Feedback
Molt bé, el nombre de columnes d'A coincideix amb el nombre de files de B i per tant, podem multiplicar-les. I la matriu resultant té el mateix nombre de files que la matriu A i el mateix nombre de columnes que la matriu B.
Choice 5
Answer
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
30%
25%
20%
16.66667%
14.28571%
12.5%
11.11111%
10%
5%
-5%
-10%
-11.11111%
-12.5%
-14.28571%
-16.66667%
-20%
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-33.33333%
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-66.66667%
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-83.33333%
-90%
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Feedback
Choice 6
Answer
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
30%
25%
20%
16.66667%
14.28571%
12.5%
11.11111%
10%
5%
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-10%
-11.11111%
-12.5%
-14.28571%
-16.66667%
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-66.66667%
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-83.33333%
-90%
-100%
Feedback
Choice 7
Answer
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
30%
25%
20%
16.66667%
14.28571%
12.5%
11.11111%
10%
5%
-5%
-10%
-11.11111%
-12.5%
-14.28571%
-16.66667%
-20%
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-33.33333%
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-66.66667%
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-83.33333%
-90%
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Feedback
Combined feedback
For any correct response
For any partially correct response
Options
Show the number of correct responses once the question has finished
For any incorrect response
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Penalty for each incorrect try
100%
50%
33.33333%
25%
20%
10%
0%
Hint 1
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Hint 2
Hint text
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Created / last saved
Created
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Admin User
on
Wednesday, 12 June 2013, 1:03 PM
Last saved
by
Admin User
on
Wednesday, 12 June 2013, 1:03 PM
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