It was the same way I think a lot of us used textbooks back in the day. Can’t figure out how to solve a problem, so look around for a similar setup in the chapter.
If AI is just a search over all information, this makes that process faster. I guess the downside is there was arguably something to be learned searching through the chapter as well.
Homework problems are normally geared to the text book that is being used for the class. They might take you through the same steps, developing the knowledge in the same order.
Using another source is probably going to mess you up.
Depends. Do they care about the problem? If so, they'll quickly hit diminishing returns on naive LLM use, and be forced to continue with primary sources.