Answer: 1:2.
- A 1:3
- B 1:2
- C 1:1
- D 2:1
Correct answer: B. 1:2
Explanation: Point dividing in ratio k:1: ((4k+1)/(k+1),(4k+1)/(k+1),(4k+1)/(k+1)). Sum = 3(4k+1)/(k+1) = 6. So 12k+3 = 6k+6, 6k=3, k=1/2. Ratio = 1:2.
Three mutually perpendicular axes x, y, z meeting at the origin O, with a point P located by its (x, y, z) coordinates.
Concept context
Lines and planes in 3D space, direction cosines, distances, and angles