what would happen to the impedance of a series circuit containing an inductor, capacitor and resistor if the supply frequency is varied from 0 to infinity Hz

Answer 1

At 0 Hz, the capacitor has high impedance
At high Hz, the inductor has high impedance

The circuit's impedance reaches a minimum at the resonant frequency of the LC portion.

The resistor keeps it from ever being zero, to protect the voltage source.