engineering recuitment ONGC AEE Mechanical Mock Test 2025 Engineering Mathematics Differential Equations Exact Differential Equations
अवकल समीकरण M dx + N dy = 0 यथार्थ होगा, यदि एवं केवल यदि -
1
My = Nx = 0
2
My - Nx = 0
3
Mx + Ny = 0
4
Mx - Ny = 0
5
Mx / Ny = 0