MCQMediumJEE Main 2025 · 29 January, Shift 1Equation of Line in 3D

Mathematics Question from JEE Main 2025 · 29 January, Shift 1

Let a→=i+2j+k\overrightarrow{a} = i + 2j + k and b→=2i+7j+3k\overrightarrow{b} = 2i + 7j + 3k. Let L1:r→=(−i+2j+k)+λa→,λ∈RL_1 : \overrightarrow{r} = (-i + 2j + k) + \lambda \overrightarrow{a}, \lambda \in \mathbb{R} and L2:r→=(j+k)+μb→,μ∈RL_2 : \overrightarrow{r} = (j + k) + \mu \overrightarrow{b}, \mu \in \mathbb{R} be two lines. If the line L3L_3 passes through the point of intersection of L1L_1 and L2L_2, and is parallel to a→+b→\overrightarrow{a} + \overrightarrow{b}, then L3L_3 passes through the point:

  • A

    (−1,−1,1)(-1, -1, 1)

  • B

    (5,17,4)(5, 17, 4)

  • C

    (2,8,5)(2, 8, 5)

  • D

    (8,26,12)(8, 26, 12)

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