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JEE Mathematics · Medium

Three Dimensional Geometry: Direction ratios MCQ

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Direction ratiosMediumQuestion 350004

Question

The direction ratios of the line joining (1,2,3) and (4,7,−1) are:
  1. A
    3, 5, −4
    Correct
  2. B
    3, 5, 4
  3. C
    −3, −5, 4
  4. D
    1, 2, −1

Correct answer

3, 5, −4

Explanation

DR = (x₂−x₁, y₂−y₁, z₂−z₁) = (4−1, 7−2, −1−3) = (3, 5, −4).

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