### Electric field due to seven point charges

Consider a cube of edge a with the location and orientation of the fig. (see attachment). There is a point charge q at each corner except at (a,a,0). Find E at the empty corner.

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Consider a cube of edge a with the location and orientation of the fig. (see attachment). There is a point charge q at each corner except at (a,a,0). Find E at the empty corner.

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Please see the attached file.

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Please see attached file.

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