Physics 2 Question?

In the figure, charge q 1 = 2.8 × 10-6 C is placed at the origin and charge q 2 = -6.4 × 10-6 C is placed on the x-axis, at x = -0.20 m. Where along the positive x-axis can a third charge Q = -8.3 µC be placed such that the resultant force on this third charge is... show more In the figure, charge q 1 = 2.8 × 10-6 C is placed at the origin and charge q 2 = -6.4 × 10-6 C is placed on the x-axis, at x = -0.20 m. Where along the positive 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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