A) Parallel
B) Perpendicular
C) Concurrent
D) None of these
Correct Answer: C
Solution :
\[\left| \,\begin{matrix} p-q & q-r & r-p \\ q-r & r-p & p-q \\ r-p & p-q & q-r \\ \end{matrix}\, \right|=\left| \,\begin{matrix} 0 & q-r & r-p \\ 0 & r-p & p-q \\ 0 & p-q & q-r \\ \end{matrix}\, \right|=0\] Hence the lines are concurrent. Aliter: Since sum of the coefficient of x, y and the constant term is zero, hence the lines are concurrent.You need to login to perform this action.
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