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Test-Lidia
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Considerando las propiedades de las potencias, di cuáles de las expresiones siguientes son equivalentes a <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mi»#a«/mi»«mi»#b«/mi»«/msup»«/math»</span>.
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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
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mfenced»«msup»«mi»#a«/mi»«mi»#c«/mi»«/msup»«/mfenced»«mi»#d«/mi»«/msup»«/math»
Grade
None
100%
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83.33333%
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66.66667%
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16.66667%
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Feedback
Muy bien. Si tenemos una potencia de un potencia, dejamos la misma base y multiplicamos los exponentes.
Choice 2
Answer
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mfenced»«msup»«mfenced»«mrow»«mo»-«/mo»«mi»#a«/mi»«/mrow»«/mfenced»«mi»#d«/mi»«/msup»«/mfenced»«mi»#c«/mi»«/msup»«/math»
Grade
None
100%
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83.33333%
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70%
66.66667%
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16.66667%
14.28571%
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Feedback
Muy bien. Como la base negativa está elevada a un número par, el resultado final será positivo, por tanto, es equivalente a escribir esta expressión con la base positiva.
Choice 3
Answer
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mfenced»«mfrac»«mn»1«/mn»«msup»«mi»#a«/mi»«mi»#d«/mi»«/msup»«/mfrac»«/mfenced»«mrow»«mo»-«/mo»«mi»#c«/mi»«/mrow»«/msup»«/math»
Grade
None
100%
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83.33333%
80%
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70%
66.66667%
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Feedback
Muy bien. El exponente negativo invierte la base y obtenemos una potencia de una potencia que es equivalente a la expressión inicial.
Choice 4
Answer
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mi»#a«/mi»«mi»#c«/mi»«/msup»«mo»·«/mo»«msup»«mi»#a«/mi»«mi»#d«/mi»«/msup»«/math»
Grade
None
100%
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83.33333%
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70%
66.66667%
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33.33333%
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16.66667%
14.28571%
12.5%
11.11111%
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Feedback
Atención, si tenemos un producto de potencias con la misma base, sumamos los exponentes, no los multiplicamos.
Choice 5
Answer
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mi»#a«/mi»«mi»#d«/mi»«/msup»«mo»:«/mo»«msup»«mi»#a«/mi»«mi»#c«/mi»«/msup»«/math»
Grade
None
100%
90%
83.33333%
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70%
66.66667%
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Feedback
Atención, si tenemos un cociente de potencies con la misma base, restamos los exponentes, no los multiplicamos.
Choice 6
Answer
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mfenced»«mrow»«mo»-«/mo»«msup»«mi»#a«/mi»«mi»#d«/mi»«/msup»«/mrow»«/mfenced»«mi»#c«/mi»«/msup»«/math»
Grade
None
100%
90%
83.33333%
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70%
66.66667%
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50%
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33.33333%
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14.28571%
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Feedback
Atención, la base negativa no está elevada a un número par y, por tanto, el resultado final será negativo. La expressión inicial tiene resultado final positivo.
Choice 7
Answer
Grade
None
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83.33333%
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66.66667%
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Feedback
Choice 8
Answer
Grade
None
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83.33333%
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66.66667%
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33.33333%
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Feedback
Choice 9
Answer
Grade
None
100%
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83.33333%
80%
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70%
66.66667%
60%
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33.33333%
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16.66667%
14.28571%
12.5%
11.11111%
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Feedback
Combined feedback
For any correct response
For any partially correct response
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For any incorrect response
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Penalty for each incorrect try
100%
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33.33333%
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0%
Hint 1
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Hint 2
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Wednesday, 12 June 2013, 1:12 PM
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on
Wednesday, 12 June 2013, 1:12 PM
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