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De-watermarking of mathematics video in senior three.
Mathematics, the concept is understood, (no need to recite, see the explanation below) this is only the first step, and it is useless after this step is completed.

(The following two steps are my methods. Some people like to do problems, and I like to watch them. )

The second step is to look at the problem and the key issues. What I saw at that time was the complete solution of the textbook, an absolutely good book! Look thoroughly, don't worry about class homework)

The third step is to read the topic well. It is difficult to read it the first time, and then think about why the topic is done and why the formula concept is so applied. Until the end, the problem will be simple.

(I still suggest that you look at the complete solution of the textbook, the 32K watermark, and know which topics are beyond the classroom or the difficulty is not suitable for the current level when you look at the topics. )

This method is also applied to the homework assigned by the teacher, watching and thinking over and over again. I don't know if you have seen the Dragon Slayer by the Eternal Hand. In it, when Zhang Sanfeng taught Zhang Wuji martial arts, he was asked to forget his tricks, and so was learning mathematics. At first he remembered the trick (not the theorem, but how to use it), and finally he was so skilled that he forgot the trick and used it by hand.

In another year, if you think hard and improve quickly, by the way, you must write down what you think every time you watch it, so that you can consolidate and improve when you watch it again. It is also convenient to review later and write in pencil. For example, when you watch it for the fifth time, you will feel that the content you think for the second time is "naive", hehe.

I seem to have written a detailed study method before. If you like, you can tell me your email address and I'll send it to you.