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Donats els vectors <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»u«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«/math»</span>#u, <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»v«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«/math»</span>#v i <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»w«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«/math»</span>#w <div>a) Troba les coordenades dels vectors:</div><div><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»u«/mi»«mo»§#8594;«/mo»«/mover»«mo»-«/mo»«mn»2«/mn»«mover accent=¨true¨»«mi»v«/mi»«mo»§#8594;«/mo»«/mover»«mo»+«/mo»«mn»3«/mn»«mover accent=¨true¨»«mi»w«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«/math»</span>({:SA:=#a1},{:SA:=#b1},{:SA:=#c1})</div><div><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mo»-«/mo»«mn»2«/mn»«mover accent=¨true¨»«mi»u«/mi»«mo»§#8594;«/mo»«/mover»«mo»+«/mo»«mover accent=¨true¨»«mi»v«/mi»«mo»§#8594;«/mo»«/mover»«mo»-«/mo»«mn»4«/mn»«mover accent=¨true¨»«mi»w«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«/math»</span>({:SA:=#a2},{:SA:=#b2},{:SA:=#c2})<br /><div>b) Calcula <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»a«/mi»«mo»§nbsp;«/mo»«mi»i«/mi»«mo»§nbsp;«/mo»«mi»b«/mi»«/math»</span> tals que <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»u«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«mi»a«/mi»«mover accent=¨true¨»«mi»v«/mi»«mo»§#8594;«/mo»«/mover»«mo»+«/mo»«mi»b«/mi»«mover accent=¨true¨»«mi»w«/mi»«mo»§#8594;«/mo»«/mover»«/math»</span></div><div><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»a«/mi»«mo»=«/mo»«/math»</span>{:SA:=#sol_a}<br /></div><div><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»b«/mi»«mo»=«/mo»«/math»</span>{:SA:=#sol_b}</div><div><br /></div></div>
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Monday, 15 July 2013, 9:11 AM
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