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TS EAMCET · Maths · Three Dimensional Geometry

The position vectors of the points P and Q are respectively -2i¯-3j¯+k¯ and 3i¯+3j¯+2k¯. The ratio in which the point having position vector -92i¯-6j¯+12k¯ divides the line segment joining P and Q is

  1. A -3 : 2
  2. B 1 : 2
  3. C 2 : 1
  4. D -1 : 3
Verified Solution

Answer & Solution

Correct Answer

(D) -1 : 3

Step-by-step Solution

Detailed explanation

x-coordinate of A =3λ+1-2λ+1=-92 ⇒23λ-2=λ+1-9 ⇒15λ=-5 λ=-13 So, A is dividing PQ externally in ratio 1:3.