Engineering Mathematics Calculus Vector Calculus

If \(\vec{r}\) = x\(\hat{i}\) + y\(\hat{j}\) + z\(\hat{k}\) then find ∇r−3

1
−9r−4
2
−3r−4(\(\hat{i}\) + \(\hat{j}\) + \(\hat{k}\))
3
9r−4
4
\(-3r^{-5}\vec{r}\)

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