Through the vertex A of the parabola ((z...

Through the vertex `A` of the parabola `((z-bar(z))/(2i))^(2)=2(z+bar(z)),` where `z=x+i y`, `(i=sqrt(-1))` two chords `AP` and `AQ` are drawn and the circles on `AP` and `AQ` as diameters intersect in `R`. If `m_(1)` ,`m_(2), m_(3)` are slopes of tangent to parabola at `P` ,tangent to parabola at `Q`, `AR `respectively then find `|(1)/(m_(1)m_(3))+(1)/(m_(2)m_(3))|`

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