defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Differential Equations Formation of a Differential Equation
The differential equation representing the family of ellipse having foci either on the x-axis or on the y-axis, centre at the origin and passing through the point (0,3) is?
1
\(xyy' + y^2 - 9 = 0\)
2
\(x + yy'' = 0\)
3
\(xyy'' + x(y')^2 - yy' = 0\)
4
\(xyy' - y^2 + 9 = 0\)