Order of the differential equation of family of ellipses whose eccentricity is known, is

The differential equation of family of circles whose centre lies on x-axis, is

The degree and order of the differential equation of the family of all parabolas whose axis is x - axis, are respectively :

Find the differential equation of the family of circles whose centres lie on X -axis.

The order of the differential equation of the family of parabolas whose axis is the X-axis is

The degree and order of the differential equation of the family of all parabolas whose axis is x-axis, are respectively

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

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