Question: Macmillan Learning A charge 91 = - +3q is at the origin, and a charge q2 = -q is on the x-axis at x

Macmillan Learning A charge 91 = - +3q is at the origin,

Macmillan Learning A charge 91 = - +3q is at the origin, and a charge q2 = -q is on the x-axis at x = a, where a > 0. Find the expression Ex

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