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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 point S satisfying the relation `(SQ)^(2)+(SR)^(2)=2(SP)^(2) `is

A

a straight line parallel to X -axis

B

a circle through the origin

C

a circle with centre at the origin

D

a straight line parallel to Y-axis

Text Solution

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The correct Answer is:
D
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