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If P(1,0), Q(-1,0) and R (2,0) are three...

If P(1,0), Q(-1,0) and R (2,0) are three given points, then the locus of the point `S` satisfying the relation `(SQ)^2+(SR)^2=2(SP)^2`

A

a straight line parallel to the x-axis

B

a cirle passing through the origin

C

a circle with the centre at the origin

D

a straight line parallel to the y-axis

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A DAS GUPTA-Coordinates and Straight Lines-EXERCISE
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