JEE Main 2024 Mathematics question
If the mirror image of the point P(3, 4, 9) in the line is (α, β, γ), then 14(α + β + γ) is:
Answer: (D)
Solution
Foot of the perpendicular at t = 23/14 is (83/14, 32/14, 51/14); the image is (124/14, 8/14, −24/14) and 14(α + β + γ) =
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