Answer
$12x^2 y+2xy+4x^3$
Work Step by Step
Here, we have $f(x, y)=4x^3y$ and $g (x, y)=xy^2+x^4$
The divergence of the given functions can be calculated as:
$\dfrac{\partial f}{\partial x}+\dfrac{\partial g}{\partial y}=12x^2 y+2xy+4x^3$
or, $=12x^2 y+2xy+4x^3$
