Three point charges are arranged along the x-axis. Charge q1 = -5.00 nC is located at x = 0.250 m and charge q2 = 3.00 nC is at x = -0.340 m. A positive point charge q3 is located at the origin. Where along the x-axis can q3 be placed and the net force on it be zero, other than the trivial answers of x = +∞ and x = -∞?