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Question: The lines $(p-q)x+(q-r)y+(r-p)=0 \\ (q-r)x+(r-p)y+(p-q)=0 \\ (r-p)x+(p-q)y+(q-r)=0$ are



1) Parallel
2) Perpendicular
3) Concurrent
4) None of these
Solution: Explanation: No Explanation
Concurrency of three lines

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