JEE Main 2024 Mathematics question
Let (α, β, γ) be the foot of perpendicular from the point (1, 2, 3) on the line . Then 19(α + β + γ) is equal to :
Answer: (A)
Solution
The foot is (5k − 3, 2k + 1, 3k − 4), and the vector to (1, 2, 3) is perpendicular to (5, 2, 3): 5(5k − 4) +
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