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<div>Donats el punt P =#P i la recta r :<span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfrac»«mrow»«mi mathvariant=¨normal¨»#x1«/mi»«/mrow»«mrow»«mi mathvariant=¨normal¨»#u1«/mi»«/mrow»«/mfrac»«mo»=«/mo»«mfrac»«mrow»«mi mathvariant=¨normal¨»#y1«/mi»«/mrow»«mrow»«mi mathvariant=¨normal¨»#u2«/mi»«/mrow»«/mfrac»«mo»=«/mo»«mfrac»«mrow»«mi mathvariant=¨normal¨»#z1«/mi»«/mrow»«mrow»«mi mathvariant=¨normal¨»#u3«/mi»«/mrow»«/mfrac»«/math»</span></div><div>a) Trobeu l’equació cartesiana (és a dir, de la forma Ax + By + Cz + D = 0) del pla que passa per P i és perpendicular a la recta r.</div><div><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»§#960;«/mi»«/math»</span>: #A x+{:SA:=#B}y + {:SA:=#C}z+{:SA:=#D}=0<br /></div><div><br /></div><div>b) Trobeu el punt de tall entre la recta r i el pla π.</div><div><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»Q«/mi»«mo»=«/mo»«/math»</span>({:SA:=#q1},{:SA:=#q2},{:SA:=#q3})</div>
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Monday, 15 July 2013, 9:11 AM
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