Answer
3
Work Step by Step
div $\textbf{F}$=$\nabla\cdot \textbf{F}=\nabla\cdot \langle2x,4y,-3z\rangle$
$=\frac{\partial}{\partial x}(2x)+\frac{\partial}{\partial y}(4y)+\frac{\partial}{\partial z}(-3z)$
$=2+4-3=3$
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