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Let a given line L1 intersect the X and ...

Let a given line `L_1` intersect the X and Y axes at P and Q respectively. Let another line `L_2` perpendicular to `L_1` cut the X and Y-axes at Rand S, respectively. Show that the locus of the point of intersection of the line PS and QR is a circle passing through the origin

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Since a and b are fixed so the equation represent a circel which passes through the origin
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