- #1

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## Homework Statement

If r = <x, y, z> and r

_{0}= <x

_{0}, y

_{0}, z

_{0}>, describe the set of all points (x, y, z) such that the magnitude of r – r

_{0}= 4.

## Homework Equations

## The Attempt at a Solution

I don't know what this problem is asking to even attempt a possible solution. Please help?