Is this the correct partial derivative of B?(adsbygoogle = window.adsbygoogle || []).push({});

##\vec{B} = \frac{g \vec{r}}{4 \pi r^3}##

##\frac{\partial \vec B}{\partial r}## = ##-3\frac{g \vec{r}}{4 \pi r^4} + \frac{g}{4 \pi r^3 }(\frac{\partial r_r \hat r}{\partial r})##

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# I Partial Vector Derivative

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