If P ( - 3 , - 2 , 4 ) ,   Q ( - 9 , - 8 , 10 ) and R ( - 5 , - 4 , 6 ) are collinear, then the ratio…

If P(-3,-2,4), Q(-9,-8,10) and R(-5,-4,6) are collinear, then the ratio in which R divides PQ is
  1. 1 : 2
  2. 2 : 1
  3. 3 : 1
  4. 1 : 3

Solution

Use section formula

⇒-5=-9λ-3λ+1

⇒-5λ-5=-9λ-3

⇒4λ=2

⇒λ=12

1:2

Asked in: AP EAMCET 2020 (23 Sep Shift 1)

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