Form the differential equation of family of lines situated at a constant distance `p` from the origin.

Form the differential equation of family of standard circle

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

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

The equation of set of lines which are at a constant distance 2 units from the origin is

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

Find the differential equation of the family of all straight lines.

The differential equation of the family of straight lines which are at a distance 3' units from origin is

Form the differential equation of the family of circles touching the y-axis at origin.

Form the differential equation of the family of circles touching the x-axis at origin.