일반물리학 2 — Electric Potential: Problem 7

7 In Fig. 24-26, particles with the charges \(q_1 = +15e\) and \(q_2 = -5e\) are fixed in place with a separation of \(d = 24.0 \text{ cm}\). With electric potential defined to be \(V = 0\) at infinity, what are the finite (a) positive and (b) negative values of \(x\) at which the net electric potential on the \(x\) axis is zero?