The three lines px + qy + r = 0, qx + ry + p = 0, rx + py + q = 0 are concurrent if
Mathematics · JEE Advanced · NTA Exams — Co-ordinate Geometry
The three lines px + qy + r = 0, qx + ry + p = 0, rx + py + q = 0 are concurrent if
- p + q + r = 1
- p2 + q2 + r2 = pr + rq
- p3 + q3 + r3 = 3pqr
- none of these
Answer
(D) none of these
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