Two small conducting spheres, sphere 1 of mass \(m\) with charge \(+Q\) and sphere 2 of mass \(3m\) with charge \(+2Q\), are suspended from a single support point by identical light insulating strings of length \(L\). The spheres repel each other and come to rest in static equilibrium, such that the strings make small angles \(\theta_1\) and \(\theta_2\) with the vertical, respectively. Which of the following expressions represents the ratio \(\dfrac{\tan\theta_2}{\tan\theta_1}\)?