You can't know a problem, but you can when others talk about it, and you remember the theorems and formulas used?

Next time you encounter this problem, or change a few numbers, it won't happen again.

For senior three students, you have actually done more than 90% of the questions in every exam, but the numbers have changed, or the graphics have changed, the formula form has changed, the conditions have changed, but the knowledge points are not new.

It is important to learn mathematics and do more problems, but it is not enough to do sea tactics. It's important to recite things, but it's not enough to learn math with a backrest.

When someone explains it to you, the most important thing is not that he tells you how to calculate it, but that the short time from the moment he sees the problem to the moment he has an idea, or even a moment, is his way of thinking about solving the problem.

You need help, let the master tell you how to think, learn to think, instead of ordinary people's textbook answers.

50 points is a bit low, and in senior three, if you really want to improve, there are still many things to do, and there are no shortcuts.

It is purely a personal opinion, so it can be treated critically. Ask your teacher for advice.