If the lines `p_1 x + q_1 y = 1, p_2 x + q_2 y=1 and p_3 x + q_3 y = 1` be concurrent,

If the lines `p_1 x + q_1 y = 1, p_2 x + q_2 y=1 and p_3 x + q_3 y = 1` be concurrent, show that the points `(p_1 , q_1), (p_2 , q_2 ) and (p_3 , q_3)` are colliner.