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JEE Advanced Mathematics question

MathematicsThree Dimensional GeometryJEE Advanced

Let and be two points. A line having direction ratios is perpendicular to the plane passing through the origin, and . Then equals

Answer: (A)

Solution

The plane has normal and passes through the origin: . - on it: $4 - 1 + 6λ = 0 ⇒

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Question ID VK-110349