Electric Potential

[Crazy Gnome]

1. The problem statement, all variables and given/known data
Two point charges q and -q are located on the z axis at (x,y,z) = (0,0,a) and (0,0,-a) respectively.

Find the potential \phi everwhere



3. The attempt at a solution

I know all the equations and such, I just don't know how to integrate it. I am guessing that it is in cylindrical coordinates.

[Defennder]

Why do you need to integrate it? Just find the potential at any point due to q and the one due to -q and add up the two. This one you can easily apply the formula for potential due to point charge.