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Find the value of lamda of the following...

Find the value of `lamda` of the following pair of lines are perpendicular to each other
`(1-x)/(3)=(7y-14)/(2lamda)=(5z-10)/(11)` and `(7-7x)/(3lamda)=(y-5)/(3lamda)=(6-z)/(5)`

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The correct Answer is:
`lamda=7`
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BETTER CHOICE PUBLICATION-THREE DIMENSIONAL GEOMETRY -ASSIGNMENT MOST IMPORTANT QUESTIONS FOR PRACTICE (SECTION IV) Short Answer Type Questions
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  9. Show that the following lines are perpendicular (-x+2)/(-2)=(y-1)/(...

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