Alternating Current

An a.c. source of angular frequency '\(\omega\)' is fed across a resistor '\(R\)' and a capacitor '\(C\)' in series. The current registered is I. If now the frequency of source is changed to \(\frac{\omega}{3}\) (but maintaining the same voltage), the current in the circuit is found to be halved. The ratio of reactance to resistance at the original frequency '\(\omega\)' will be