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A line L passing through the point (2, 1...

A line `L` passing through the point (2, 1) intersects the curve `4x^2+y^2-x+4y-2=0` at the point `Aa n dB` . If the lines joining the origin and the points `A ,B` are such that the coordinate axes are the bisectors between them, then find the equation of line `Ldot`

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