Problem: An infinite plane of charge with = -3.60 µC/m2 is at x = -2.5 cm, and an infinite plane of charge with σ = 7.70 µC/m2 is at x = 2.5 cm.
Part A: What is the electric field at x = 1.00 cm?
I known the correct solution but I need to know how to get that. Thanks in advance!