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Q.

The normal to the circle given by x2+y2-6x+8y-144=0 at 8, 8 meets the circle again at the point 

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a

2, -16

b

2, 16

c

-2, 16

d

-2, -16

answer is D.

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Detailed Solution

Normal at a point to the circle intersect the circle again at the other end of the diameter passing along the normal, 

Centre of the circle =C3, -4. Given point A=8, 8

Let B be the point at with the normal meets the circle again.

Then midpoint of AB=CB=2C-A=23, -4-8, 8=-2, -16.

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