Rebirth: I carry a desktop computer inside me

886×886=784,996

seconds out of the answer.

666！=1010632056840......

Well, this calculation is a bit large, and it reacts a little for a few seconds.

However, through several experiments, Jiang Cheng also found that in the face of these functional problems, he could not directly calculate the answer in his mind. Instead, it still relies on the idea of solving the problem.

Although there are flaws, Jiang Cheng is still very happy, which is another boost to his hope of entering a 985 university.

Chen Guoqing began the lecture without hurry. Whether it is easy or difficult, he is very detailed.

Jiang Cheng experimented for only a minute, then immediately retracted his heart and followed Chen Guoqing to start a question-by-question.

The first multiple-choice question, but Jiang Cheng just saw it.

"This multiple-choice question should be very simple, in fact, it is to substitute n+1 into it..." As he spoke, Chen Guoqing listed the equation on the blackboard.

Given that f(n)=1+1/2+1/3+...+1/3n-1, we get f(n+1)=1

+1/2+1/3+...+1/3n-1+... 1/3(n+1)-1

"Then, subtract the two equations,......" Chen Guoqing tirelessly listed the terms.

In Jiang Cheng's mind, several terms in the ellipsis were instantly completed, two items were subtracted, and the duplicates were eliminated, leaving only a few more items.

Although the independent variable "n" exists, this does not affect the calculation of the numbers in Jiang Cheng's mind.

The answer, then, is C. Chen Guoqing wrote the result, "Who else did not understand the solution to this problem?" A

simple calculation, most people have no problem, Jiang Cheng also understood.

After everyone was silent for a long time, Chen Guoqing continued to talk about the second question.

Jiang Cheng also continued to follow, because he had not read books and done questions for some years, and when he first saw these topics, Jiang Cheng was a little confused.

But after entering a state of full-time learning, Jiang Cheng found out for the first time that he was not fucking stupid at all, and he could understand.

These problem-solving ideas were instantly enlivened under Chen Guoqing's step-by-step solution.

But after all, Jiang Cheng still has not mastered a lot of mathematical knowledge, or even did not learn at all, the more the topic behind, the difficulty began to increase, some knowledge points, even if he listened to the lecture, Jiang Cheng was confused.

But Jiang Cheng was not distracted at this moment, and absorbed the knowledge flowing from the topic wholeheartedly.

Sitting in the last row, plus the high stack of books, no one noticed Jiang Cheng's changes.

Even Qin Jin didn't pay attention to whether Jiang Cheng was listening to the lecture or not. He read the book seriously, without distraction.

By the end of class, Chen Guoqing had already talked about the first big topic.

This is a function problem with knowledge such as vectors. Chen Guoqing spoke in detail, but Jiang Cheng still lacked a lot of knowledge.

Maybe others take it for granted, from A can B, easy to get C and other logic, but Jiang Cheng does not understand.

Can't turn around.

The mathematics of the entire ninth class is not good, only Chen Hao and a few other students are slightly better, and the rest are basically passing grades.

Science mathematics in high school is still a little difficult, many topics are changeable, the knowledge points of the test are mixed, and sometimes the problems are just like Olympiad questions.

After class, everyone changed the atmosphere of silence, and many began to chat.

Chen Guoqing has a good temper, and everyone is not afraid of him. But during class, everyone did not dare to speak.

Because mathematics is too difficult, everyone is afraid of being caught by Chen Guoqing to do the problem.

Among the topics he talked about before, there were 2 Jiang Cheng still not very clear, and now he took the test paper and walked up.

"Teacher, I don't understand this question a little.

"Oh, which?" Chen Guoqing, a math teacher, lifted his reading glasses to the bridge of his nose and took the book, only then realized the strangeness of the voice and looked up.

"Jiang Cheng?" Jiang Cheng

smiled awkwardly, "Teacher, you still remember me." "

The last place for 2 consecutive years, there is an impression. Chen Guoqing said without saltiness or lightness, and turned to look at the topic.

Well, the penultimate is also rememberable.

"This is a typical commutation method. Chen Guoqing spoke unfast, his voice was not high, but it was very steady.

Under Chen Guoqing's detailed explanation, Jiang Cheng's thinking suddenly turned.

"Jiang Cheng, if you want to raise your math scores, it's best to go through all the high school mathematics, do all the example problems, and strive to get the scores of some not difficult questions. Chen Guoqing was still very pleased that Jiang Cheng could take the initiative to ask questions, and after answering the questions, he instructed very seriously.

"Okay. Jiang Cheng naturally responded, and then left the podium.

Many people in the ninth class watched Jiang Cheng return from the podium with some stunnedness.

It's strange, Jiang Cheng, who relies on all this mathematics, actually asked the teacher questions?

The identity of the poor student in the previous life, plus the appearance of flowing anger, originally had no friends in the class, and then was not admitted to university, and there was no intersection with the classmates.

Therefore, in this life, Jiang Cheng did not have the heart to befriend them.

Returning to his seat, Jiang Chengma picked up the freshman math and prepared to take a look at it first.

Qin Jin suddenly felt that reading books was no longer tasteful.

His eyes looked at Jiang Cheng with some resentment.

Obviously said yes to go to work together, but you secretly got serious.

Jiang Cheng turned a blind eye and looked at the book quickly. By the time the class bell rang, I had already turned more than ten pages.

After receiving the book and continuing to think about it, sure enough, all the knowledge of Chinese and mathematics that I had read before could be remembered and came to mind.

Continuing to follow the rhythm of Chen Guoqing's lecture, Jiang Cheng felt even more strenuous. Especially the last two big questions, one analytic geometry and one series, for Jiang Cheng, it is not understandable.

After finishing the topic, there are still about 10 minutes left. Chen Guoqing asked everyone to sort out the wrong questions, and if there were questions, they could ask questions freely.

Jiang Cheng did not go up to ask questions again this time, he already felt that there were still many weak points in his mathematical foundation. Just doing the questions will not have a great effect.

At that moment, Jiang Cheng picked up the math book and continued to read chapter by chapter.

Jiang Cheng paid more attention to the examples in the books. In your mind, you must go through it several times and make up some similar topics on your own to make yourself fully understand.

The time to dedicate yourself to study always passes quickly, and before you know it, the morning is over.

Because it is the third year of high school, many students take food on or around the campus, and some even rent houses next to the school, just to prepare for the college entrance examination.

Jiang Cheng's family lives in Nancheng, some distance from Guanglin Middle School. Although his grades were not good, he still took lunch at school like other students.

"Let's go, orange, let's eat." "Qin Jin has been sitting for a long time, and he has long been uncomfortable. As soon as Chen Guoqing left, he immediately jumped up and pulled Jiang Chengcheng to leave.

"Not going. Jiang Cheng shook his head and sat firmly in his seat.

At the beginning, the cafeteria was crowded, and it took a while to queue up, and with this time, it was better to read a book for a while.

Taking out Yu Xinran's language notebook, Jiang Cheng was ready to look at it for a while before going to eat something simply.

Qin Jin's body is relatively thin, and where he can move Jiang Cheng, he feels extremely injured at this time. "Okay, I'll eat by myself. "

When I walked, I still turned back in two steps, like an abandoned grudge....

After a while, all the students in the class were gone, and only Jiang Cheng was left.

Quiet classrooms, with creaking ceiling fans, perfect for studying.

Jiang Cheng had never been so eager to learn for a moment. Especially after he never forgets, he urgently needs more knowledge to fill his mind.

One, two、......、 ten、......、 twenty.

Juanxiu's notes were firmly remembered in the depths of Jiang Cheng's mind, and as long as he thought about it a little, he quickly found his imprint.

After learning like this, half an hour passed, and the classmates came back one after another.

Qin Jin also arrived at this time, looked depressed, and handed over the small white bag in his hand, "Na, I knew that you would not go to dinner, and brought you a few big steamed buns."

"Okay, thanks, brother!" Jiang Cheng was also not polite, and he happened to be a little hungry when he returned to his senses.

The steamed buns are a little cold and hard, and with water, Jiang Cheng eats it very fragrantly.

Qin Jin sat down with a butt, "I feel that you are really stunned, and you won't eat any food." You won't be ghosted, will you..." Jiang

Cheng was stunned, "What is going on in your kid's head, can't you say that I suddenly got the hang of it?"

At noon, about two-thirds of the 58 people in the class did not go home, some resting on their stomachs, others continuing to read.

Qin Jin saw that Jiang Cheng began to read while biting the steamed bun again, and naturally knew in his heart that he was not making a show, but coming for real.

He originally wanted to read the novel, but after thinking about it, he took out a math book and planned to read it.

ヽ( ￣д￣;) ノ

Those jumbled numbers, letters, and formulas emerged from all directions, spinning in circles in front of my eyes.

"Snap"

Qin Jin lay on the book, closed his eyes and fell asleep....

In a quiet corner, there is only the sound of turning books, and occasionally the hiccups of dry steamed buns and the snoring of sleep.

By noon, Jiang Cheng had already read all of Yu Xinran's notes.

The gains were naturally great, and Jiang Cheng expected that the language would be improved by at least twenty or thirty points. After all, it's impossible to test all the original questions on your notes.

For the rest of the time, Jiang Cheng did not review again, but narrowed slightly.

Although young, he didn't sleep all day and was somewhat sleepy.

The afternoon is English and biology lessons.

The English class is also about test papers, but Jiang Cheng did not listen to it, but took the high school English book and went through it.

The words in high school were all memorized, which was helpful for Jiang Cheng to understand how much a sentence was.

But English is not enough to rely on vocabulary, but also grammar, slang and other factors. Moreover, a word may have many other connotations, and if you only translate the English word into Chinese to understand, you will not understand.

Coupled with the sometimes lengthy, inverted qualifiers in English, it is even more confusing.

Jiang Cheng also understands that English still pays more attention to vocabulary and sense of language, which can only be accumulated and practiced through ordinary practice.

As for living things, there is also more content in memory. There are even people who feel that biology has been reduced to the liberal arts and geography should be attributed to the sciences.

Therefore, Jiang Cheng memorized all the high school creatures, but he also increased his self-confidence.

Looking at the stack of books in front of me, they are basically textbooks or test papers, and there are some tutoring books, which were also purchased uniformly in the first and second years of high school.

It's time to buy some supporting books.

Five years college entrance examination three years simulation or something, these must be prepared a set, right?