JEE Advanced 2019 Paper 2 Mathematics Q8

Mathematics

Problem

The lines L₁ : r⃗\vec{r} = λî, λ ∈ ℝ; L₂ : r⃗\vec{r} = k^\hat{k} + μĵ, μ ∈ ℝ; and L₃ : r⃗\vec{r} = î + ĵ + νk^\hat{k}, ν ∈ ℝ are given. For which point(s) Q on L₂ can we find a point P on L₁ and a point R on L₃ so that P, Q and R are collinear?

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