Wouldn't the impedance of the capacitor and inductor have not real but purely imaginary value? If we do the operation "0.1/(1000+0.1)" we are treating the capacitor and inductor with real impedance which is not true. While the error on this calculation in particular is small, doing this the same way could result in more error in less extreme cases.

Instead, in this case, it should be along the lines of "-0.1/(1000-0.1)" which gives 0.0001V/V of gain. Obviously not a big difference here but would have an effect elsewhere.

Also seen here:

https://www.allaboutcircuits.com/tex...ies-r-l-and-c/
Or if I happen to be misled in some way here, please inform me.

Edit: This also looks like something that would have resonance.

Edit 2: Well my diagram I realize isn't the same anyway. Without the load resistor it changes things a little. Mine assumes it is infinite resistance. Well, yours does too.