Vectors

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Question 1 of 3

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

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$r=\lambda (i+2j+k)$

$r=\lambda (i-2j+k)$

$r=\lambda (i+2j-3k)$

None of these

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