A series LCR circuit with $L= 0.12 H,C= 480\;nF,R= 23 \Omega$ is connected to a $230\;v$ variable frequency supply .For What frequencies of the circuit half the power at resonant frequency . What is the current amplitute at these frequencies?

Question

$\begin{array}{1 1} 41.667 \pm 95.83\; ; 10 \;A \\ 416.67 \pm 95.83\; ; 10 \;A \\ 41.667 \pm 95.83\; ; 10 \;A \\ 4166.7 \pm 95.83\; ; 1 \;A \end{array}$