Chapter 21, Problem 23P

GO In Fig. 21-32, particles 1 and 2 of charge q₁ = q₂ = +3, 20 × 10⁻¹⁹ C are on a y axis at distance d = 17.0 cm from the origin. Particle 3 of charge q₃ = +6.40 × 10⁻¹⁹ C is moved gradually along the x axis from x = 0 to x = +5.0 m. At what values of x will the magnitude of the electrostatic force on the third particle from the other two particles be (a) minimum and (b) maximum? What are the (c) minimum and (d) maximum magnitudes?

Figure 21-32 Problem 23.