A series circuit consisting of a capacitor and a coil with active resistance is connected to a

Question:

A series circuit consisting of a capacitor and a coil with active resistance is connected to a source of harmonic voltage whose frequency can be varied, keeping the voltage amplitude constant. At frequencies w1 and w2 the current amplitudes are n times less than the resonance amplitude. Find:
(a) The resonance frequency;
(b) The quality factor of the circuit.