let-c-is-a-constant-vector-and-r-xi-yj-zk-then-proved-that-grad-c-r-n-n-c-r-n-2-c-r-c-

Question Number 84969 by subhankar10 last updated on 18/Mar/20

let c is a constant vector and \vec{r} = x \hat{i} + y \hat{j} + z \hat{k} then proved that grad ∣ c \times \vec{r} ∣^{n} = n ∣ c \times \vec{r} ∣^{n - 2} c \times (\vec{r} \times c) .