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If the points whose position vectors are $2 \hat i+\hat j+\hat k, 6 \hat i-\hat j+2 \hat k$ and $14\hat i-5 \hat j+p \hat k$ are collinear, then the value of p is

\[\begin {array} {1 1} (a)\;2 & \quad (b)\;4 \\ (c)\;6 & \quad (d)\;8 \end {array}\]
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(b) 4
answered Nov 7, 2013 by pady_1

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