Form the differential equation of all concentric circles at the origin.

The differential equation of all conics whose centre lie at the origin is of order

The differential equation of all ellipses centred at the origin is

Form the differential equation of family of lines concurrent at the origin.

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

Form the differential equation of family of circles having center at origin.

Form the differential equation of the family of circles in the second quadrant and touching the coordinate axes.

Form the differential equation of the family of circles in the second quadrant and touching the coordinate axes.

Form the differential equation of the family of circles in the second quadrant and touching the coordinate axes.

Statement I The order of differential equation of all conics whose centre lies at origin is , 2. Statement II The order of differential equation is same as number of arbitary unknowns in the given curve.

Find the differential equation of system of cocentric circles with centre (1,2)