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Consider a family of circles which are p...

Consider a family of circles which are passing through the point (-1, 1) and are tangent to x-axis. If (h,k) are the co-ordinates of the centre of the circle, then the set of values of k is given by the interval :

A

`k ge 1/2`

B

`-1/2 le k le 1/2`

C

`k le 1/2`

D

`0 lt k lt 1/2`

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The correct Answer is:
A
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