engineering recuitment BHEL Engineer Trainee Mock Test 2025 Engineering Mathematics Differential Equations Exact Differential Equations
The integrating factor for ydx - xdy = 0 is:
1
\(\rm \dfrac{x}{y}\)
2
\(\rm \dfrac{y}{x}\)
3
\(\rm \dfrac{1}{x^2+y^2}\)
4
None of these