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

The order of differential equation of all circles with radius 'a' is.

The order of differential equation of all circles of given radius 'a' is

Obtain the differential equation of all circles of radius r.

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

Obtain the differential equation of all circles of radius rdot

The order of the differential equation of all rectangular hyperbola is

The order of differential equation of all circles of given radius 'a' is _______

The order of the differential equation of all circle of radius r, having centre on y-axis and passing through the origin, is

The order of the differential equation of all circle of radius r, having centre on y-axis and passing through the origin, is