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The point Q is the image of the point P(...

The point Q is the image of the point P(1,5) about the line y=x and R is the image of the point Q about the line y=-x. The circumcentre is the `DeltaPQR` is

A

(5,1)

B

(-5,1)

C

(1,-5)

D

(0,0)

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The correct Answer is:
A, C
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