Rebirth of the big era of online games

Chapter 20 Consistency Inequality (plus 4000)

Fang Jie has never been interested in all kinds of messy Western festivals.

Because he is a rational person, he can deeply see through this Western festival. In fact, it is the result of speculation by countless capital merchants to make money. Many festivals have lost their original meaning.

It was useless for Fang Jie to think so alone. Others, especially girls, valued these festivals very much. They could not care about them, but they had to care about Li Qing's feelings.

"Do you have any good suggestions?" Fang Jie wrote on the draft.

Seeing this sentence, Zhang Ru secretly rolled her eyes.

Her "eldest brother" is like this, saying that he doesn't understand romance. He has had a crush on Li Qing for so many years. Every year, he prepares birthday cards and birthday gifts to make everyone feel so romantic; Make plans, and have no opinion at all.

Even though she thought so, Zhang Ru still wrote three key words in the book: "Rose, KFC, Video Room."

After seeing these keywords, Fang Jie couldn't help but be taken aback.

Rose...well, it should be.

But KFC...what the hell?

Why not Haidilao?

But on second thought, I almost forgot that it was 2000!
sea ​​fishing...

It should still be unknown in some junk by now.

At this moment, KFC is a rare commodity in China. There are less than 400 stores in the country, and most of them are still concentrated in first-tier cities. At present, there is only one KFC store in the entire Tongcheng. It is the most prosperous in the city center. Lot.

As for McDonald's...

Copper City is not yet available.

In this era of foreign adoration and underdeveloped economy, it is a very fashionable and extravagant way of dating to take your girlfriend to eat KFC, especially in third- and fourth-tier cities like Tongcheng, it can definitely act as a force. Effect.

Unlike later generations, if you take your girlfriend to eat KFC on Valentine's Day, it will probably be considered a very insincere expression. People usually only go there occasionally because the children in the family like to eat them, not because they have their own. needs in this regard.

Well, KFC can.

After marking the first two keywords with "√" respectively, look back.

Video room...what do you mean?

Commercial movie theaters have not yet emerged at this time, and couples really go to the small video hall to watch any movie, which will show various pirated Hong Kong and Taiwan movie video tapes and some indescribable late-night movies...

Now the relationship between the two has made great progress, so it is a normal choice to go to such a place to watch a movie. As for the movie theater managed by Wang Xiran's mother, it can only be regarded as the auditorium of a state-owned enterprise. It will only show regular copyrighted movies, not regular dates. place.

After putting a "√" on the "Video Room", Fang Jie, who was very satisfied, wrote the word "thank you" under the line.

Zhang Ru glanced at it, smiled knowingly, and felt very happy for Fang Jie.

Fang Jie was thinking about how to contact Li Qing and whether he should buy a mobile phone.

In fact, the current mobile phone prices have gradually become civilians, there are tens of thousands of blocks, there are also several thousand.

For example, the Nokia 3210, a classic low-end phone that went on the market last year, has only sold more than 1 mobile phones with 3000 million units worldwide. Although it is an all-English mobile phone, it does not affect making calls.

Moreover, in 2000, the mobile phone network access fee was only 200 yuan, unlike before, when buying a [-] yuan mobile phone, you had to spend thousands of fast money for the network access fee.

As for why there is such a thing as a network access fee... Fang Jie, who is well-informed, is also a little confused. Maybe it is because the mobile phone number has been expanded from ten digits to eleven since 1999, and the number resources are not tight, so the network access fee is reduced. down?

However, after thinking about it for a while, Fang Jie felt that the phone was for the time being and he couldn't buy it.

It's not that I can't bear the money, but it's too dazzling.

Get a mobile phone and put it on your body, you can't explain it to your family at all, this is the second thing.

The point is, when people around see it, they will never think that he bought the phone with his own money, but think that his father must have taken bribes. The so-called fearful words, he doesn't want to bring unnecessary things to his father. Trouble.

At a time when the benefits of this state-owned enterprise are not good, if the father and son pretend to be coercive everywhere with a mobile phone, they will definitely be struck by lightning.

"It seems that I can only go to the Internet cafe to find her after school at noon..."

Fang Jie sighed silently, and began to wonder why he didn't see each other in the morning.

Isn't it because she has exposed all her thoughts over the years to her, making her embarrassed to see him for a while, right?

so embarrassing...

Just as they were leaving for desertion, the head teacher Zhu Lei called his name on the podium: "Fang Jie, Wang Xiran, you two come up and do this question."

Fang Jie looked up and saw that Zhu Lei was looking at him with a smile.

It looks like this is a class transfer assessment?

Not to mention Wang Xiran's character, at least his academic performance is among the best, and he is first in the liberal arts class. If he only counts his foreign language and mathematics scores, he can also enter the top ten of the grade, about 7th or 8th.

Zhu Lei named the two of them to take the stage to do the question, obviously to fight in the arena. It seemed that she wanted to see how good he was as a scholar, or maybe she wanted to stimulate the classmates in the class and let them know what it means to be outside the world.

Fang Jie didn't care, and immediately got up on stage.

Wang Xiran, who had dressed herself up as a lady, also stood up, tidied up her dress a little pretentiously, and walked slowly to the podium.

At the same time, all the students in the class put down what they were doing, and followed the two closely, guessing in their hearts what the final result would be.

Wang Xiran was close to the podium and was the first to arrive. After glancing at the questions on the blackboard, he did not immediately start answering the questions. Instead, he turned around and looked at Fang Jie, who was walking towards her, expressionlessly or proudly, as if he wanted to. Have a fair fight.

Of course, she remembered that she was tricked by Fang Jie that night, but she didn't care, being suppressed by the boy she liked made her feel that she really did not see the wrong person, and she liked Fang Jie even more in her heart.

The strong are always the strong, and you must firmly believe that you are the queen!
This is the concept her mother has always instilled in her, so Wang Xiran has absolute confidence and conceit in herself. A small setback can't hit her at all. In her eyes, Li Qing is not a threat at all except for being pretty!
Besides, you are pretty too!

Seeing Wang Xiran patiently waiting for Fang Jie to come to power, Zhu Lei couldn't help but tease: "Oh, it seems that our school girl classmates are not allowed to be men, do you want to challenge our school girl head-on? Wang Xiran, today is Valentine's Day. Oh, if you solve the problem first than Fang Jie, I will ask Fang Jie to invite you to dinner today!"

"Wow!"

"There's a good show to watch!"

"Fang Jie wouldn't let the water out on purpose, would he?"

"How is that possible! Who doesn't know he likes..."

"Brother, come on!"

The whole class was suddenly boiling, and there was nothing to say.

At this time, Fang Jie had come to the stage, and glanced at the head teacher speechlessly, thinking that this teacher Zhu is not going to return to the magic capital soon, so he let himself go like this, and he likes to mess around with mandarin ducks, right?
I really can't let you succeed. Today we have to accompany Li Qing!

Wang Xiran stepped forward, squeezed his fist, and said firmly, "I will win!"

Since the last time, Fang Jie has not had a good impression of Wang Xiran. He didn't bother to pay attention to him at all. After he got a piece of chalk at the podium, he began to answer questions on the blackboard on his own.

Seeing that the other party ignored him, Wang Xiran couldn't help but stunned for half a second, then stomped his feet in anger, and quickly took the chalk and turned around to answer the question.

Zhu Lei's problem is not difficult, that is, to find the monotonically increasing interval of a function.

Not to mention the tyrants like Fang Jie and Wang Xiran, it is estimated that more than half of the class will do it, but the steps are a little troublesome, and it takes some time to use the image method or other methods to deduce.

So, this question only examines speed.

However, in less than half a minute, while Wang Xiran was still drawing a form and drafting a draft beside the topic, Fang Jie threw away the chalk and stood silently pretending to be aggressive.

He has already answered the question, and the steps to answer the question are very simple. He only used two steps, wrote a derivation formula, and calculated the answer.

He absolutely does not allow his time to be occupied by other girls on Valentine's Day.

Normally, no matter who it is, including math teacher Zhu Lei, it is impossible to write down the derivation steps and answers in half a minute, because even if you copy the answers, it will take half a day.

But Fang Jie just finished his answer.

Then there is only one possibility: he must be wrong!

Zhu Lei didn't realize that Fang Jie had finished answering the question at first, she was dumbfounded for a few seconds before she asked, "Have you finished?"

Without waiting for Fang Jie's answer, Zhu Lei hurriedly ran to the answer and glanced at it, only to be stunned: "The answer is right, but what did you write in the derivation formula?"

Fang Jie shrugged: "Calculus derivatives. You didn't say you can't solve problems with calculus, right?"

Computer programming majors all need to learn advanced mathematics calculus. After all, they have to deal with functions all day long, and it is not too easy to use calculus to solve high school function mathematics problems.

"Calculus? Advanced Mathematics?"

Zhu Lei was shocked at first, but then she stared at the formula on the blackboard again, frowned and said, "Even if it is calculus, what is your derivation logic? Why can't I understand your derivative integral formula?"

Fang Jie said with a smile: "This is the consistency inequality, the definition of the same micro-quotient. The derivation and proof process involves three major median theorems, namely Rolle's median theorem, Cauchy's median theorem, and Lagrange's median theorem. Two sentences are not clear."

"..." Zhu Lei didn't know what to say, and was speechless.

Her math teacher couldn't understand what Fang Jie was saying, but she just intuitively judged that what the other party said might be right.

If Chen Qing'an was here, he would definitely kiss Fang Jie, because the concept and expression method of calculus proposed by Fang Jie solved a century-old problem in the field of higher mathematics education.

Before this concept was proposed, the basic principles of calculus were difficult to understand, and it was difficult for beginners to understand. Crisis, it took a hundred years to explain the basic principles of calculus with the concept of limit, but it is still very difficult to understand.

In the next 2 or 3 years, Academician Lin Qun of my country proposed the "Consistency Inequality" to define derivatives, which simplified the basic principles into elementary mathematics, so that high school students or beginners can understand its concepts and widely used in practical teaching. .

Therefore, this is a very valuable set of theoretical concepts, which should be understood by all those who have studied advanced mathematics in later generations, but it is still a very new concept. If you write a related paper, it is probably not a problem to come back with a domestic mathematics award.

It's a pity that Zhu Lei is not Chen Qingan who likes to study mathematics. She didn't realize the value of this. After she came back to her senses, she just said: "If you use calculus to answer the questions in the college entrance examination, the scoring teacher may not give you marks. You give me Answer normally."

"it is good."

Fang Jie nodded, picked up the chalk again and started the normal mode.

Anyway, he has already answered the question first, and this time he just answered it again, and the previous mandarin duck score is invalid.

Wang Xiran, who was still answering the questions, looked calm on the surface, but she was crying at the moment, and there were beads of sweat on her forehead.

So bullying!
Solving problems with calculus!

If Wang Xiran lived in the later world, he would probably use the word "dimension reduction blow" to describe his mood at the moment.

However, even without calculus, Fang Jie and Wang Xiran finally completed the answer almost at the same time.

After all, he has the answer and several other solutions in his heart, and the process of solving the problem does not need to be deduced at all, it is just a record.

Victory and defeat.

After putting down the chalk, Wang Xiran, who has always paid great attention to the management of his own image and expression, lowered his head and looked gloomy. He had lost this match too thoroughly, and he was simply shameless.

Fang Jie didn't continue to sprinkle salt on the other's wound, or he didn't take Wang Xiran to heart at all, and went straight back to his seat under the silent attention of the whole class.

As soon as he was seated, Zhang Ru touched his elbow: "Amazing!"

Fang Jie shook his head and smiled. He knew that he was a bit of a bully, but it wasn't enough to say that he was too powerful. Anyone who knew calculus for such a function problem could beat Wang Xiran.

"Now everyone knows their gap, right?"

Zhu Lei on the podium took this opportunity to start beating the whole class: "The new year is over, and on the first day of school today, you should immediately get nervous! Fang Jie, I will allow you to review other subjects in my math class in the future."

Zhu Lei is completely at ease with Fang Jie's mathematics. She is only worried about whether this guy's history and politics can pass the test. After all, other people have been divided into arts and sciences in the second year of high school, and Fang Jie has just started.

Fang Jie didn't expect to be named again. After looking up at the head teacher, he nodded to show his understanding, while the other students looked at him enviously.

"What are you looking at? Are you not convinced?"

I just heard Zhu Lei say again on the stage: "If your math scores are as good as him, you can have such privileges! That's it, take a 5-minute break, the next two classes are politics. Wang Xiran, you come to the office with me. Get the class schedule for this semester and post it on the wall later."

After saying that, Zhu Lei turned and left, and Wang Xiran, the study committee member, also got up and followed out.

As soon as the head teacher left, the whole class exploded and became lively.

Several girls hurriedly got up and approached Fang Jie, surrounded him tightly, and called him "brother" while laughing.

Seeing this group of girls whom he recognized in junior high school, Fang Jie's head froze for a while, and he didn't know what Li Qing would think if he saw this scene...

(End of this chapter)