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O is the origin, P(2,3,4) and Q(1,k,1) a...

O is the origin, P(2,3,4) and Q(1,k,1) are points such that `bar(OP)botbar(OQ).` Find k.

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The correct Answer is:
` k = -2`
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-DIRECTION COSINES AND DIRECTION RATIOS -TEXTUAL EXERCISE -6(B)
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