If the normals at the points on the parabola meet on the parabola, prove that
The equations of the normal at t1,t2 are
Let the normal at t1 and t2 meet at t3 on the parabola
Therefore lies on the first two equations,hence
.Let these two equations be 3 and 4.
(Since t1 not equal to t3).
(Since t1 si not equal to t2).