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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

`-(1)/(2) le k le (1)/(2)`

B

`k le (1)/(2)`

C

`0ltklt(1)/(2)`

D

`k ge (1)/(2)`

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The correct Answer is:
D
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