Vectors

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Multiple Choice

The vector equation of the line of intersection of the planes $r.(i+2j+3k)=0$ and $r.(3i+2j+k)=0$ is

  1. $r=\lambda (i+2j+k)$
  2. $r=\lambda (i-2j+k)$
  3. $r=\lambda (i+2j-3k)$
  4. None of these
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