JEE Main 2022 Mathematics question
If the length of the perpendicular drawn from the point P(a, 4, 2), a > 0 on the line (x + 1)/2 = (y − 3)/3 = (z − 1)/(−1) is units and , , ) is the image of the point P in this line, then equal to :
Answer: (2)
Solution
Let , , ) be the foot of the perpendicular from P(a, 4, 2). PR the line: , so . Then $ = (-5λ + + (3λ - + (λ + =
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