Tangents `PA` and `PB` are drawn to parabola `y^(2)=4x` from any arbitrary point `P`
Channel: Doubtnut
Date: 12/04/2020

Tangents `PA` and `PB` are drawn to parabola `y^(2)=4x` from any arbitrary point `P` on the line `x+y=1`.   Then vertex of locus of midpoint of chord `AB` is