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TS EAMCET · Maths · Three Dimensional Geometry

If the collinear points A, B and C have position vectors respectively (1, x, 3), (3, 4, 7) and (y,-2,-5), then x+y=

  1. A -1
  2. B 1
  3. C -5
  4. D 5
Verified Solution

Answer & Solution

Correct Answer

(A) -1

Step-by-step Solution

Detailed explanation

We have points A1,  x,  3, B3 , 4,  7 and Cy, -2, -5, which are collinear. Now, AB→=2i^+4-xj^+4k^, BC→=y-3i^-6j^-12k^ and CA→=1-yi^+x+2j^+8k^ Then,…