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## Homework Statement

If

*Q*1 in the above figure is twice

*Q*2 and both are positive, where can a point of zero potential be found?

## Homework Equations

V = kq/r

## The Attempt at a Solution

I know that eventually I'll have to set it up so that kq/r = kq/r, but my problem is, how do you know where this point will be? How do you know whether it will be between the two points or outside the two points? Thanks!