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NTA Abhyas JEE Main2020MathematicsThree Dimensional GeometryPractice

If the lines x - 1 1 = y - 3 1 = z - 2 λ and x - 1 λ = y - 3 2 = z - 4 1 intersect at a point, then the value of λ 2 + 4 is equal to

Options

  1. A8
  2. B10
  3. C13
  4. D5

Correct answer

A. 8

Step-by-step solution

Both the lines intersect at a point So, 0 0 2 1 1 λ λ 2 1 = 0 ⇒ 2 2 - λ = 0 ⇒ λ = 2

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