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Question: Answered & Verified by Expert
If the line passes through the points P6,-1,2,Q8,-7,2λ and R5,2,4, then value of λ is ________
MathematicsThree Dimensional GeometryMHT CETMHT CET 2019 (02 May Shift 1)
Options:
  • A -3
  • B 0
  • C -1
  • D 2
Solution:
1631 Upvotes Verified Answer
The correct answer is: -1
Since, P6,-1,2  and  Q8,-7,2λ  and  R5,2,4a re collinear then, direction ratios of PR1,-3,-2 and PQ-2,6,2-2λ are proportional, then
1-2=-22-2λ
1-λ=2λ=-1

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