Mathematics

Problem

Consider a family of circles which are passing through the point

(-1, 1)

and are tangent to

X

-axis. If

(h, k)

are the coordinate of the centre of the circles, then the set of values of

k

is given by the interval a.

-\frac{1}{2} \le k \le \frac{1}{2}

k \le \frac{1}{2}

0 \le k \le \frac{1}{2}

k \ge \frac{1}{2}