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1. The problem statement, all variables and given/known data

Given the vector, find the dot product.

2. Relevant equations

dot product of nabla and the vector is just partial derivative of each component.

3. The attempt at a solution

I'm trying to figure out if I can just leave out the denominator, since it is a scalar (the magnitude of vector r). The answer, however, is 2/r , so I'm starting to think it's gonna be necessary to change to plane polar coordinates.

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# Homework Help: Divergence, nabla

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