Although it won't, I'll give you a method: first set an initial frequency f, then the inductive reactance of the inductor and the capacitive reactance of the capacitor can be obtained by formulas (I don't know how to write it, encyclopedia should have it), the voltage of the series circuit is added by three, then the current is I, and then the three combinations come out. Later, it was said that the frequency changed to 2f. Similarly, expressions can be obtained. Let's solve f and I, which is probably what this means. sorry This seems to be the content of my sophomore year. I am a senior (I have graduated for two years)!
Although you can't do it, don't lose heart. I'll show you a joke "quenching thirst"
Three years ago, I could do trigonometric functions, solve multivariate higher-order equations and recite classical Chinese. Although my English is not good, I know it's either/or, and I know the significance of the Revolution of 1911, so I drew a map of atmospheric circulation. Furthermore, I can recite the list of chemical elements, know the redox reaction and neutralization reaction, understand the circuit diagram, know Newton's three laws, and know that plant cells have cell walls, but animal cells don't. Now I have been in college for three years.