Order of the differential equation of the family of all concentric circles centred at `(h,k)` is

Order of the differential equation of the family of all concentric circles centered at (h,k) is

Find the differential equation of the family of concentric circles x^2+y^2=a^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 the family of circles : with centre at (1, 2)

Form the differential equation of family of standard circle