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In the figure, charge q1 = 3.1 × 10-6 C is placed at the origin and charge q2 = -8.7 × 10-6 C is placed on the x-axis, at x = -0.20 m. Where along the x-axis can a third charge Q = -8.3 µC be placed such that the resultant force on this third charge is zero?
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