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Question

The plane XOZ divides the join of (1, -1, 5) and (2, 3, 4) in the ratio λ:1 then λ is [JET 1988]


A

-3

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B

3

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C

13

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D

13

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Solution

The correct option is D

13


Since ZOX plane i.e. y = 0divides the join of (1,–1, 5) and (2, 3, 4) in the ratio λ:1.
3λ1λ+1=0 λ=13.


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