engineering recuitment ISRO Scientist Electronics Mock Test Engineering Mathematics Calculus Differentiability
If z = xy In(xy), then
1
\(x\frac{{\partial z}}{{\partial x}} + y\frac{{\partial z}}{{\partial y}} = 0\)
2
\(y\frac{{\partial z}}{{\partial x}} = x\frac{{\partial z}}{{\partial y}}\)
3
\(x\frac{{\partial z}}{{\partial x}} = y\frac{{\partial z}}{{\partial y}}\)
4
\(y\frac{{\partial z}}{{\partial x}} + x\frac{{\partial z}}{{\partial y}} = 0\)