Write the order of the differential equation of the family of circles of radius `r` .

Writhe the order of the differential equation of the family of circles of radius r.

Write down the order of the differential equation of the family of all circles in a plane which have a fixed raduis r.

The order and degree of the differential equation of the family of circles of fixed radius r with centres on the y-axis, are respectively a) 2,2 b) 2,3 c) 1,1 d) 1,2

Find the order of the differential equation of the family of all circles with their centres at the origin.

Obtain the differential equation of all circles of radius r.

What is the order of the differential equation of all circles of given radius a ?