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In the following we use the notations: ⃗r = (x, y, z) = xˆi + yˆj...

In the following we use the notations: ⃗r = (x, y, z) = xˆi + yˆj + z ˆk, also r = √ x 2 + y 2 + z 2 1. Calculate the gradient of f(⃗r) = r −6

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