What power is fed into the circuit?

Question

Voltage U = Uo sin ωt is applied to the infinite endless circuit,
consisting of capacitors and inductors, as shown at this picture:

http://alexandersemenov.tripod.com/circuit/index.html

Uo = 20 V, ω = 2π x 60 Hz
What power is fed into the circuit?

Answer 1

P= V^2/Z

Zc=-j/ ω C
Zl=j ω L