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[" 17.Consider a family of circles which...

[" 17.Consider a family of circles which are passing through the "],[" point "(-1,1)" and are tangent to "x" -axis.If "(h,k)" are the circle "],[" coordinate of the centre of the circles,then the set of values "],[" of "k" is given by the interval "],[[" (a) "-(1)/(2)<=k<=(1)/(2)," (b) "k<=1," (a) "(1)/(2)]]

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