JEE Advanced · 2009 · 12 Apr 2009 · Paper 1 · Three Dimensional Geometry

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Let be a point in space and be a point on the line

Then the value of for which the vector is parallel to the plane is
  1. (A)✓ Correct
  2. (B)
  3. (C)
  4. (D)

Answer: (A)

Solution

Any point on the line can be taken as . Then . For to be parallel to the plane , it must be perpendicular to the normal vector . Thus:


JEE Advanced · 2009 · 12 Apr 2009 · Paper 1 · Single correct option

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