Understanding and Operating on 1/|x| in Spherical Coordinates

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SUMMARY

The discussion focuses on expressing the term 1/|x| in spherical coordinates, specifically in terms of unit vectors. It establishes that in spherical coordinates, the norm of a vector is represented as r, leading to the conclusion that 1/|x| can be simplified to 1/r. The gradient of this expression is calculated as (-1/r^2)*ur, where ur denotes the unit vector in the radial direction. This formulation allows for straightforward operations on the expression within the context of spherical coordinates.

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Given the term 1/|x|, and assuming in the context of the problem that a spherical coordinate basis is preferred, how can I write 1/|x| so that I can perform operations on it (gradient, etc), i.e in terms of it's unit vectors? Sorry about the vagueness of the question, but I think that's the source of my confusion.
 
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The norm of a vector in spherical coordinates is simply r. So 1/|x|=1/r. Gradient e.g. is (-1/r^2)*ur, where ur is the unit vector in the r direction. Is that too easy?
 

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