The line meets the parabola at P,Q. The lines joining P and Q to the focus meet the parabola in M,N.Show that the equation to MN is
Let be the given points.
Therefore equation to PQ is
Given equation of PQ is . Let this be 2.
Given PM,QN are the focal chords.If M and N are the points t3 and t4, then
Equation to MN is
Substituting from 2,