MathematicsMedium127×since 2002Q3063Consider a family of circles which are passing through the point (−1,1)(-1, 1)(−1,1) and are tangent to xxx-axis. If (h,k)(h, k)(h,k) are the coordinate of the centre of the circles, then the set of values of kkk is given by the interval :A−12≤k≤12- {1 \over 2} \le k \le {1 \over 2}−21≤k≤21Bk≤12k \le {1 \over 2}k≤21C0≤k≤120 \le k \le {1 \over 2}0≤k≤21Dk≥12k \ge {1 \over 2}k≥21Check answerSkip