The spring rain continued, but it was not heavy, but it continued. It took a week of spring rain. Liu Yichen watched his lifespan continue to decline every day, and his face was gloomy once.

But it was raining that he couldn't jog for five kilometers or play basketball. He could only watch and was helpless. Now he had more points and was full of blood. Even if the spring rain came for a month, he could hold on for the time being.

Liu Yichen couldn't help but feel a little secretly grateful. Fortunately, he was self-disciplined before, insisted on exercising every day, and kept accumulating points, otherwise he would have to die of worry.

In the spring rainy season, you have to bring an umbrella when you go out. It is wet everywhere, and even your clothes are not dry. Anyway, Liu Yichen has to buy a hairdryer to blow clothes specifically, otherwise it will be very uncomfortable to wear these clothes.

With the start of the new semester, each training class has officially begun. Liu Yichen does not study in the classroom every evening, but in the training class. Today's Olympiad Mathematical Training Class, tomorrow's Olympiad Training Class, and the day after tomorrow's Olympiad Training Class... It's very busy, but very fulfilling.

In this busy study, time is used up to the greatest extent and is rarely wasted.

The teaching of experimental classes is obviously faster than that of ordinary classes. The teachers have to talk about a knowledge point in one class and then assign homework. It doesn’t matter if you don’t understand it. Take the initiative to preview and review it yourself, and then understand and consolidate it by doing homework. It doesn’t matter if you don’t understand it. There is an exam for each subject a week, and you can do the questions through the exam to further consolidate it.

In the experimental class, it emphasizes self-learning ability and self-discipline. In the ordinary class, you don’t know how to do it, and the teacher has to explain it to you slowly. The teacher also has to consider whether he teaches quickly or the teaching method is not right. Here you have to improve yourself, preview yourself in advance, review yourself, ask your classmates if you don’t understand, and reflect on yourself if you don’t understand.

Not enough time?

The desk lamp artifact is there. You don’t need to sleep that long every day. Go to bed later at night and get up early in the morning.

Under such high intensity, either you collapse or you become stronger!

After years of exploration, the teachers have already realized that human potential is infinite, and what they have shown now is the tip of the iceberg.

As they often say, time is like milk... No, it is time is like water in a sponge, and there is always squeeze!

Of course, the experimental class is not the cruelest, nor is it the one who hates the most. In the second semester, the horn sounded 100 days before the college entrance examination. With the start of the 100-day oath-taking ceremony for the college entrance examination, even those who are nervous will realize that the college entrance examination is really not far away and the college entrance examination is really coming.

The countdown to the college entrance examination is not only on the stairs, but has already entered the classroom. The countdown to the college entrance examination is xx days under the classroom clock. The senior high school has basically entered the third round of review as a whole. There is a test paper for each subject every day, a monthly exam, a mock exam, and a joint exam...

Some students are under too much pressure and are resting during evening self-study, playing wildly, shouting loudly, and yelling.

That tense learning atmosphere even infected everyone in the second year and first year of high school, making everyone study harder.

From time to time, senior high school students sang, sang "Friendship Long Time", and sang various popular songs to relieve stress.

In this learning atmosphere that is obviously more tense than the first semester, Liu Yichen ushered in the first big gain of this semester. During the breaks that were sunny after the rain, the school held a commendation meeting for the Three Good Students. Liu Yichen received the Three Good Student Certificate and a 2,000 yuan bonus from the principal. Then a group of students who received Three Good Students lined up on the podium and took a group photo.

In the first grade of senior high school, all the places for the Sanhao students were included in the experimental class. However, it is understandable that one of the conditions for the selection of Sanhao students is students with both good character and academic performance, and an important measure of students is grades.

And good grades are all in the experimental class.

"Liu Yichen, how do these three good students feel?" Feng Lin said with envy.

In elementary school and junior high school, she got the certificate of 3 good students, and all the three good students were covered with walls, but when she arrived in high school, she didn't get the three good students at once.

"What do you feel like? No!" Liu Yichen said calmly: "Isn't it just a certificate? It's really, it's no big deal."

"We'll go out for dinner together tonight. I'll treat you to improve the food!" Liu Yichen shook the red envelope in his hand. The red envelope was 2,000 yuan.

To be honest, Liu Yichen is not short of money now. Although most of the money is taken by him to buy stocks, the remaining thousands of dollars are enough for his life for several months, so he is quite embarrassed to take the bonus, but it is not enough not to take it, because if you don’t take it, what should others do if you ask them to do?

With this 2,000 yuan bonus, many students don’t have to ask their parents for living expenses for a semester, and can even give their parents a few hundred yuan to improve their family situation and reduce the burden on their families.

Although Qingcheng is a mountainous area, education is still very important. Every year, enterprises or wealthy people donate money and materials to the school, and there are also education foundations. As long as you are really outstanding, the school will even waive tuition and miscellaneous fees and accommodation fees, and even give you monthly meals, which is enough to allow you to study until the college entrance examination with peace of mind.

If you pass the college entrance examination, if you pass the Tsinghua University and Peking University, the bonus from all parties alone is at least enough for the first year's tuition and living expenses, so you don't have to worry about not being able to afford to go to school. If you pass the first-class entrance examination and the average family, you can also apply for a student loan. The interest rate is actually very low. You only need to pay it back two or three hundred yuan a month after graduating from college, and it is easy to pay it off without any pressure.

"Don't be too rude~" Feng Lin said.

"How much can two people eat~" Liu Yichen said indifferently.

The two of them ordered two stir-fry dishes and a stewed soup in a restaurant near the school, which cost 40 yuan.

"I can see that you are a rich woman, you are quite affordable." Liu Yichen said. To be honest, sometimes when you eat in the cafeteria, Feng Lin orders only 2.5 yuan, and when you eat outside, it only costs 5 to 6 yuan.

Feng Lin's family is considered a wealthy class. Although Liu Yichen doesn't know how much Feng Lin's monthly living expenses are, it is probably not less than 1,000. Liu Yichen saw that Feng Lin has an mp4. Now everyone is still using mp3, and not everyone has mp3. However, Feng Lin already has mp4, and it is a relatively high-end mp4, which is estimated to cost thousands of dollars.

Feng Lin also buys books in bookstores from time to time, and the ones she buys are in Xinhua Bookstore, rather than street stalls selling pirated books.

"What a rich woman, it's so ugly. I'm much poorer than you. You don't need to get your living expenses from your family. I still have to rely on your family to support you." Feng Lin said, "How come you have money? It seems that you have never been short of money."

"You will know when you get the first place in the year exam!" Liu Yichen said mysteriously. Of course, he would not tell Feng Lin now that his income comes from writing novels.

"What's so mysterious?" Feng Lin became more curious when she saw this.

She felt that Liu Yichen seemed to be covered with fog, which made people unable to see clearly. The more curious she wanted to understand Liu Yichen, she found that she could not see clearly at all.

She didn't know yet, and there was a saying that curiosity killed a cat.

There is also a saying that when a woman becomes curious about a man, she is not far from falling. The more curious you are, the faster you fall, the deeper you fall.

"Hehe~~ I will naturally know when you get the first place in the exam for the first place in the exam for the exam." Liu Yichen said. Anyway, he felt that no matter how hard Feng Lin worked, he would never be able to get the first place in the exam for the first place, because Feng Lin did not have enough talent.

In the middle and lower levels, the rankings are actually the easiest and fastest. When you reach the top 20 in the year-end, it is extremely difficult to advance to one place and requires a lot of effort. If you want to get to the top 3 in the year-end, it is no longer just a hard work, but a high talent is required.

Feng Lin curled her lips, "If you don't say it, I'll see if I get the first place in the exam, I'll see what the secret is."

The two of them wiped out the dishes. Liu Yichen ate five bowls of rice alone. Perhaps because of the heavy learning task or the physical growth stage, Liu Yichen's appetite was relatively large. For example, after eating five bowls of rice, he was actually only 70% full. It was not that he really couldn't eat it. He could eat at least two bowls of rice.

The two of them were walking, holding an umbrella as it rained. The two of them inevitably got closer, and Liu Yichen could even smell the fragrance of Feng Lin.

When he returned to school, Liu Yichen soaked in the library. The library had equipment for removing dampness, so although it was raining outside, there was no such wet feeling in the library.

As the state is adjusted, the knowledge of Gaussian functions is named after the great mathematician John Carl Friedrich Gauss. It has a wide range of applications and can be seen in natural sciences, social sciences, mathematics and engineering fields.

Although the definition is constantly continuous, the mathematical form expressed is f(x)=ae^-(x-b)^2/(2c^2), where a,b,c∈r.

When learning a Gaussian function, you can not only remember a function formula, but also combine it with its graph. The graph is like an upside-down clock in shape. The parameter a refers to the peak of the Gaussian curve, b is its corresponding horizontal coordinate, c is the standard deviation, also known as the Gaussian rms wide value, which controls the width of the "clock". Gaussian function is widely used in statistics to describe normal distribution.

Liu Yichen studied its properties based on the mathematical expression of Gaussian functions and its graphics.

It is also with understanding and mastering Gaussian functions that Liu Yichen in turn has a different understanding of elementary number theory and functions in high school mathematics.

Although the frequency of Gauss' name appears is not as high as Euler, as he continues to study mathematics, Liu Yichen gradually felt the status of Gauss. It may be just a formula, but it plays an important role. Through his mathematics, through the long river of time and space, people can feel the mathematical wisdom and charm he exudes. It is a famous German mathematician, but Gauss does not belong to Germany only, it is a precious wealth of the entire human race.

Even after more than a hundred years, society is still enjoying the luster left by him.
Chapter completed!