Find the differential equation of all the ellipses whose center is at origin and axis are co-ordinate axis.

Find the differential equation of all ellipses whose centre is origin and foci is on the x-axis.

Find the differential equation of all the circles touching the x-axis at origin.

Find the differential equation of all ellipse whose centres are at the origin and principal axes along coordinate axes.

Find the differential equation of all circles touching the x-axis at the origin .

The differential equation of all ellipse centered at the origin axis being coordinate axes is:

The differential equation of all ellipses centred at the origin is

The differential equation of all ellipses centred at the origin is

Find the differential equation of all circles which touch the x-axis at the origin.

Find the differential equation of all parabolas whose axis is the X axis.

Find the differential equation of an ellipse whose major axis is twice its minor axis.