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<p><strong><span style="color: #003300;" data-mce-mark="1">Determina les coordenades del punt simètric del punt «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨12px¨»«mrow»«mi mathvariant=¨bold¨ mathcolor=¨#003300¨»A«/mi»«mfenced mathcolor=¨#003300¨»«mrow»«mo mathvariant=¨bold¨»#«/mo»«mi mathvariant=¨bold¨»a«/mi»«mn mathvariant=¨bold¨»1«/mn»«mo mathvariant=¨bold¨»,«/mo»«mo mathvariant=¨bold¨»#«/mo»«mi mathvariant=¨bold¨»a«/mi»«mn mathvariant=¨bold¨»2«/mn»«/mrow»«/mfenced»«/mrow»«/mstyle»«/math» respecte a la recta «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨12px¨»«mi mathvariant=¨bold¨ mathcolor=¨#003300¨»r«/mi»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»§#8801;«/mo»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»#«/mo»«mi mathvariant=¨bold¨ mathcolor=¨#003300¨»e«/mi»«mn mathvariant=¨bold¨ mathcolor=¨#003300¨»1«/mn»«/mstyle»«/math»</span></strong></p> <p> </p> <p><strong><span style="color: #003300;">Si O és la projecció ortogonal de A sobre r, el simètric de A respecte a r és el simètric de A respecte a O. És un punt.</span> <span style="color: #ff6600;">Format</span></strong> (2,3)</p>
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<p><span style="color: #003300;"><strong>Gràficament: #G1</strong></span></p>
No, case is unimportant
Yes, case must match
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Answer 1
Answer
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
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33.33333%
30%
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16.66667%
14.28571%
12.5%
11.11111%
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5%
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Answer 2
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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100%
50%
33.33333%
25%
20%
10%
0%
Hint 1
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<p><span style="color: #000080;"><strong>La situació és #G1</strong></span></p> <p> </p> <p><span style="color: #000080;"><strong>Primer es calcula l'equació de la perpendicular (blava) a la recta r (negra) que passa per A i que té per vector director «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨12px¨»«mrow»«mo mathvariant=¨bold¨ mathcolor=¨#00007F¨»#«/mo»«mi mathvariant=¨bold¨ mathcolor=¨#00007F¨»vp«/mi»«/mrow»«/mstyle»«/math» (perpendicular a r).</strong></span></p> <p><span style="color: #000080;"><strong>Quan es té l'equació de la perpendicular, «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨12px¨»«mrow»«mo mathvariant=¨bold¨ mathcolor=¨#00007F¨»#«/mo»«mi mathvariant=¨bold¨ mathcolor=¨#00007F¨»r«/mi»«mn mathvariant=¨bold¨ mathcolor=¨#00007F¨»2«/mn»«/mrow»«/mstyle»«/math» , n'hi ha prou amb resoldre el sistema d'equacions de les dues rectes per a trobar el punt O. </strong></span></p> <p><span style="color: #000080;"><strong>El simètric S és l'extrem d'un vector AS amb origen a A i de components dobles de les components de AO.</strong></span></p>
Hint 2
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Thursday, 23 August 2018, 4:19 PM
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Thursday, 23 August 2018, 4:19 PM
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