Capacitors in series will have the same total charge. V = Q/C. They will suck up all current in that loop when they reach steady state(when they are full of charge).
I recommend using heimlers history on youtube and using the textbook. Thats all you really need to do good in the class. Just make key connections and you’ll be fine.
Limits are undefined in three scenarios.
1. A vertical asymptote. When the function is a rational function ex. x/x-1. Set the denominator to zero and that is your VA.
2. A hole. When simplifying a function, if two terms cancel out ex. x(x-1)/x-1. Then the term that is canceled out will be your hole when set to zero.
3. A jump discontinuity. This basically when your function jumps to a different y values at certain x value.