For a given parabola \(y^2=4 a x\) two variable chords \(P Q\) and \(R S\) at right angles are dr... VIDEO
For a given parabola \(y^2=4 a x\) two variable chords \(P Q\) and \(R S\) at right angles are dr...https://bit.ly/YTAI_PWAP https://www.pw.live
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