The son-in-law who has returned for thousands of years

Xu Ping has always been bad at mathematics. Whether it is geometry or algebra, in his eyes, it is no different from alien writing, and it is still encrypted.Picking up textbooks is nothing more than fooling around with simple Zuo Shushu.

Although he has traveled here, he really doesn't have a cold for mathematics at all.

Even if he lives 1 years, he still doesn't know anything about mathematics.

It might be a matter of talent, but Xu Ping has always been helpless and didn't make much change.

It's not good if you are not good at math, anyway, you can't lose a piece of meat.

"Huh? Why does it seem so simple?"

Xu Ping glanced at the contents of the textbook, and suddenly felt that these knowledge points seemed very simple, not like reading a bible before, and his thinking was very clear.

Xu Ping became interested, and carefully read the contents of the textbook from front to back, and felt that he had mastered [-]% to [-]% of the textbook, and the several properties and formulas of the number sequence had been completely printed in his mind.

"This should also be the benefit of practice."

Xu Ping thought for a while, his sudden enlightenment in mathematics could only be a result of his practice.

Looking at Zuo Shushu who was sitting by the side, he found that Zuo Shushu was working on the last final question after the class. He pouted and frowned nicely. Xu Ping also turned the book to the exercise part and read the question. The stem of the final question is not difficult, but it is just a mixture of arithmetic sequence and geometric sequence, and some knowledge of trigonometric functions is used, but it requires a lot of calculation steps.

Xu Ping was so happy that he "stealed" a gel pen from the hole in the desk on his left, and wrote down half a page of answers in the textbook. His thoughts were extremely smooth, and he finished it in less than 5 minutes.

Zuo Shushu heard that Xu Ping seemed to be writing something, turned his head to look over, and found that Xu Ping was actually doing the finale after class.

Zuo Shushu was just pleased that Xu Ping was really studying, but he didn't expect Xu Ping to be able to solve it. After all, she didn't even have any ideas for this question, let alone Xu Ping who was ignorant all day long.

But when Zuo Shushu looked at Xu Ping's problem-solving steps, she became more and more surprised. She found that Xu Ping's thinking was clear and concise. The geometric sequence is cleverly separated, and the trigonometric functions are replaced, and the rest only needs to be calculated.

Xu Ping's thinking perfectly matched the idea of ​​the person who made the question.Zuo Shushu thought to himself that it would take at least 10 minutes to solve this problem. Unexpectedly, Xu Ping only took less than 5 minutes!

Zuo Shushu was surprised and delighted and said, "Xu Ping, you are so good. The teacher said that this question is difficult for the college entrance examination, but you actually did it in less than 5 minutes!"

Xu Ping scratched his head and said modestly, "Is it so powerful? I think it's quite simple."

Zuo Shushu looked into Xu Ping's eyes sincerely and said, "It's really amazing, can you teach me the thinking of this question?"

Afterwards, Xu Ping began a 10-minute long explanation, including the expansion of the arithmetic sequence and the simplification of the formula, which were completely his own understanding, but Zuo Shu listened very carefully, and wrote down Next what Xu Ping said.

There is such a beautiful girl sitting next to you, her face is less than ten centimeters away from you, she asks you for advice with pandan, her eyes are serious and admiring, it can be said that it is nothing more than adding fragrance to the red sleeves.