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

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

Find the differential equation of the family of lines passing through the origin.

Form the differential equation of the family of parabolas with focus at the origin and the axis of symmetry along the axis.

From the differential equation of the family of parabolas with focus at the origin and axis of symmetry along the x-axis. Find the order and degree of the differential equation.

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

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

Form a differential equation of the family of the curves y^2 =4ax .

Form a differential equation of the family of the curves y^(2)=4ax

Form the differential equation of all circle touching the x-axis at the origin and centre on the y-axis.

Form the differential equation of all circle touching the x-axis at the origin and centre on the y-axis.