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JEE Advanced Mathematics question

MathematicsStraight LinesJEE Advanced

The equation represents two mutually perpendicular lines if

Answer: (B),(D)

Solution

Perpendicular: . That rules out (a) and (c). Pair of lines: with ,

Δ=2(-2)(-1)+2·Missing argument for \tfrac\tfrac q2·Missing argument for \tfrac\tfrac12·(-Missing argument for \tfrac\tfrac32)-2(

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Question ID VK-108878