#### Consider a family of circles which are passing through the point (–1, 1) and are tangent to axis. If  are the coordinate of the centre of the circles, then the set of values of is given by the interval Option 1) Option 2) Option 3) Option 4)

As we learnt in

General form of a circle -

- wherein

centre =

Equation of circle with center  is:

We get,

Option 1)

This option is incorrect.

Option 2)

This option is incorrect.

Option 3)

This option is incorrect.

Option 4)

This option is correct.