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Donada la inequació de segon grau <br /><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»#m«/mi»«mo»§gt;«/mo»«mn»0«/mn»«/math»</span><br />assenyala les afirmacions que són certes.<br />
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One or multiple answers?
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Number the choices?
a., b., c., ...
A., B., C., ...
1., 2., 3., ...
i., ii., iii., ...
I., II., III., ...
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Algorithm
Choice 1
Answer
les solucions de la inequació són els valors de x tals que «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»#a1«/mi»«mo»§lt;«/mo»«mi»x«/mi»«mo»§lt;«/mo»«mi»#a2«/mi»«/math»
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66.66667%
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Feedback
Atenció, aquests són els valors que satisfan <span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mi»#m«/mi»«mo»§lt;«/mo»«mn»0«/mn»«/math»</span><br /><br />
Choice 2
Answer
#a3 és una solució de la inequació
Grade
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Feedback
Atenció, aquest valor satisfà <span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mi»#m«/mi»«mo»§lt;«/mo»«mn»0«/mn»«/math»</span>
Choice 3
Answer
les solucions de la inequació són els valors de x pertanyents a «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfenced»«mrow»«mo»-«/mo»«mo»§#8734;«/mo»«mo»,«/mo»«mi»#a1«/mi»«/mrow»«/mfenced»«mo»§#8746;«/mo»«mfenced»«mrow»«mi»#a2«/mi»«mo»,«/mo»«mo»+«/mo»«mo»§#8734;«/mo»«/mrow»«/mfenced»«/math»
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
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16.66667%
14.28571%
12.5%
11.11111%
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Feedback
Molt bé. Aquests són els valors que satisfan la desigualtat, expressats en forma d'unió d'intervals. Els intervals són oberts perquè la desigualtat és estricta.<br /><br />
Choice 4
Answer
les solucions de la inequació són els valors de x pertanyents a «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mo»(«/mo»«mo»-«/mo»«mo»§#8734;«/mo»«mo»,«/mo»«mo»§nbsp;«/mo»«mi»#a1«/mi»«mo»]«/mo»«mo»§#8746;«/mo»«mo»[«/mo»«mi»#a2«/mi»«mo»,«/mo»«mo»+«/mo»«mo»§#8734;«/mo»«mo»)«/mo»«/math»
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None
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Feedback
Atenció, #a1 i #a2 satisfan la igualtat i, per tant, no són solució de la inequació. <br /><br />
Choice 5
Answer
les solucions de la inequació són els valors de x tals que «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»x«/mi»«mo»§lt;«/mo»«mi»#a1«/mi»«mo»§nbsp;«/mo»«mi», o bé, «/mi»«mo»§nbsp;«/mo»«mi»x«/mi»«mo»§gt;«/mo»«mi»#a2«/mi»«/math»
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Feedback
Molt bé, aquests són els valors que satisfan la desigualtat. <br /><br />
Choice 6
Answer
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Feedback
Choice 7
Answer
Grade
None
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Feedback
Choice 8
Answer
Grade
None
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66.66667%
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33.33333%
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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
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33.33333%
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0%
Hint 1
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Hint 2
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Created
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Admin User
on
Wednesday, 12 June 2013, 1:03 PM
Last saved
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Admin User
on
Wednesday, 12 June 2013, 1:03 PM
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