Three infinitely large, parallel, insulating planes of charge are arranged. The planes from left to right have the following charge densities: -3σ, +2σ, and + σ. The distances between the planes are indicated. Since there are 3 planes, there are a total of 4 regions. Zones 1, 2, 3 and 4 respectively. Consider the regions 1 and 4. How does the electric field magnitudes in these regions compare?
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