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JEE Advanced Mathematics question

MathematicsThree Dimensional GeometryJEE Advanced

The number of real values of for which the lines and are coplanar, is

Answer: (A)

Solution

The directions and are never proportional (since ), so the lines are coplanar exactly when they intersect. The coplanarity condition, with and , is

Missing \end{vmatrix}\begin{vmatrix}0-

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Question ID VK-109850