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[Post New]24 Mar 2008 00:10:32 IST
    Subject: Re:eqn of tangent...
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raulrag009 (1205)

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Olaaa!! Perrrfect answer. 203  [298 rates]
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Let;eqn;of;tangent;be\\ 3x-y+mu=0\\ mu;is;any;constant\\ y=3x+mu\\ Since;it;touches;the;curve\\ 3x^{2}-(3x+mu)^{2}=3\\ 6x^{2}-6xmu+mu^{2}+3=0\\ D=0\\ mu=+-6\\ thus;eqn;is\\ 3x-y+-6=0
 
 
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