Q.

The locus of the centre of a circle which cuts orthogonally  the parabola y2=4x at (1,2) will pass through

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a

(3,4)

b

(4,3)

c

(5, 3)

d

(2,4)

answer is A.

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Detailed Solution

Tangent to the parabola y2=4x at (1,2) will be the locus, i.e., 2y=2(x+1) or  y=x+1
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