The first part (left hand) is resistors so it can be solved as a simple divider. To the right, you basically have a cap in parallel with an inductor. You should be able to figure what that does as frequency increases.Actually now i see i was wrong in saying it's a resonant band-pass filter. there is a low pass RC and a low pass RL filter in this circuit. so if we assume that R5 is the load then wouldn't it be a Band pass filter?