3being pulled by one and pushed by the other (since q1and q2have different signs); in this region this means the two force arrows on q3are in the same direction and cannot cancel. It should also be clear that off-axis (with the axis defined as that which passes through the two fixed charges) there are no equilibrium positions. On the semi-infinite region of the axis which is nearest q2and furthest from q1an equilibrium position for q3cannot be found because |q1| < |q2| and the magnitude of force exerted by q2is everywhere (in that region) stronger than that exerted by q1on q3. Thus, we must look in the semi-infinite
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