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**1. Homework Statement**

Two infinitely-long lines of charge run parallel to the z-axis. One has a positive uniform charge per unit length, [lambda]>0, and goes through the x y plane at x=0, y=d/2. The other has a negative uniform charge per unit length, -[lambda], and goes through x=0, y=-d/2. Nothing changes with the z coordinate; the state of affairs in any plane parallel to the x y plane is the same in the x y plane.

**2. Homework Equations**

This is where I need help.

**3. The Attempt at a Solution**

My thought is the charge will be 0, but I cannot prove this without an equation or some work.