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[Post New]22 Mar 2008 12:13:12 IST
    Subject: Re:vectors
Accepted Answer [?] [Up]
raulrag009 (1217)

Blazing goIITian

Olaaa!! Perrrfect answer. 205  [301 rates]
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total posts: 651    
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Here  goes the soln
 
Let\\\\ x,y\;be\;scalars\\\\ For\;coplanarity\\\\ (ai+j+k)=x(i+bj+k)+y(i+j+ck)\\\\ Compare\\\\ x+y=a\\ bx+y=1\\ x+cy=1\\\\ Thus\\\\ a=x+y\quad\;b=\frac{1-y}{x}\quad\;c=\frac{1-x}{y}\\\\ \frac{1}{1-a}+\frac{1}{1-b}+\frac{1}{1-c}=\\\\ =\frac{1}{1-(x+y)}-\frac{x}{1-(x+y)}-\frac{y}{1-(x+y)}\\\\ =\frac{1-(x+y)}{1-(x+y)}=1
 this reply: 21 points  (with 3 Olaaa!! Perrrfect answer.   in 6 votes )   [?]
 
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