Find the differential equation of all the circles whose radius is one unit.

Obtain the differential equation of all circles of radius r.

Obtain the differential equation of all circles of radius rdot

The order of the differential equation of all circles whose radius is 4, is ...... .

Find the differential equation of those circles whose centres lie on X -axis and whose radii are variable 'r' .

Find the differential equation of those circles whose centres lie on X -axis and whose radii are variable 'r' .

The differential equation of all circles whose radius is 5 centre is any point (h,k) is

Form the differential equation of all the circles whose centre is at origin.

Find the differential equation of all the circles which pass thorough the origin and whose centres lie on x-axis.

Find the differential equation of all the circles which pass through the origin and whose centres lie on y-axis.

Find the differential equation of all the circles which pass through the origin and whose centres lie on y-axis.