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The vertex of the parabola (y-1)^2 =8 (x...

The vertex of the parabola `(y-1)^2 =8 (x-1)` is at the centre of a circle and the parabola cuts that circle at the ends of its latusrectum. Then the equation of that circle is

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The correct Answer is:
`x^(2)+y^(2)=20`
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