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## Homework Statement

Three point charges, 3.0 [tex]\mu[/tex]c, -5.0[tex]\mu[/tex]c and 0 [tex]\mu[/tex]c.

If the distance from point 1 (3.0) and point 2 (-5.0) is 40m, what is the distance from point 2 to point 3?

## Homework Equations

coulombs law

[b

## The Attempt at a Solution

I don't know how to start this :(