Omnipotent Data

The sage ♂ no Mori.

Cheng Nuo: "Did the Gaoshu teacher call the roll? @元华"

Yuan Hua: "Not yet, I'm ready to start the first chapter, I don't think I'll do it."

Yuan Hua: "Brother, you don't know... prepare to skip class!"

If you skip class at the first class, then you are really great!

Cheng Nuo: "What can I do, I'm also desperate!!"

Yuan Hua was silent for a moment.

Yuan Hua: "Then you didn't attend the class, what about the advanced math class?"

Cheng Nuo: "It's okay. I read "Advanced Mathematics" during the summer vacation. Basically, it's not difficult, it's all the most basic stuff. Even if I'm allowed to take the final exam right now, I'm not in vain."

Cheng Nuo was right.

In the last two or three days before the end of the summer vacation, Cheng Nuo stayed at home and previewed all the freshman courses of the finance department.

As for the first volume of advanced mathematics, Cheng Nuo finished all the previews in just over half a day.

Then, I looked for the test paper of high mathematics at the end of the first semester of Tsinghua University last year and did it again.

Final score... 100 points!

Easy and stress-free! It was so simple that Cheng Nuo even wondered if what he did was an elementary school math problem.

At that time, Cheng Nuo wondered, why do many people say high math is difficult?

is it hard?

It's obviously very simple.

Someone even wrote a poem for him.

"High Math Difficulty"

Author: Hard-working college students

Hey, hey, the danger is high! The difficulty of advanced mathematics is as difficult as reaching the blue sky! Functions and limits, what a loss at the beginning! I come to one hundred and sixty pages, and I am not familiar with the answers. Sequence functions have limits, and two criteria are used to realize them. The example questions and exercises are dead, and then the final exam is linked. ... Although the university is very happy, it is better to return home early. The difficulty of high numbers is that it is difficult to go to the blue sky, and look sideways to the west.

However, this was not what Cheng Nuo was concerned about for the time being.

Cheng Nuo: "Okay, that's all for now. I see that the teacher on the podium is about to give a lecture. After the first get out of class of this big class is over, I'll find a chance to sneak back."

Yuan Hua: "Yes."

Cheng Nuo put away his phone and opened his textbook.

Uh……

Well, this is a high-level substitute class, what kind of a high-level math textbook is it!

Cheng Nuo scratched his head, stuffed the advanced mathematics textbook back into his schoolbag, and then took out a draft notebook.

They come, the security.

Since Cheng Nuo came, he couldn't just sit here.

Just in time, taking this opportunity, Cheng Nuo wanted to experience the learning atmosphere of the Department of Mathematics.

Isn't it Gao Dai?

Although the subject of Advanced Generation is a professional course of the Department of Mathematics, in the final analysis, it is only a basic course of the Department of Mathematics.

The difficulty is greater than the high number, but it is not too large.

Cheng Nuo didn't think that it would be difficult for him to go to Gao Dai. Even... in the absence of textbooks!

Cheng Nuo glanced roughly at the classroom.

Since the Finance Department and the Math Department were trained on the same playground during military training, Cheng Nuo had already known that the number of people in the Math Department this year would be around 30.

Just checked it out. In the entire classroom, there are 32 people except myself and Teacher Liao on the podium.

30 boys and 2 girls.

A rather terrifying male-to-female ratio.

Cheng Nuo couldn't help but patted his chest happily. Sure enough, it was a wise choice for me not to choose the Department of Mathematics.

However, this male-to-female ratio is also unavoidable.

After all, Tsinghua's mathematics department has been like this for many years. Girls in their mathematics department are like national treasures.

In the classroom, Cheng Nuo also found a familiar figure, Zhao Yang.

The freshman in the mathematics department who was shooting targets against Cheng Nuo in the military region. He was sitting in the first row right now, listening carefully to the teacher on the podium.

blah blah blah...

Teacher Liao who stood on the podium did not give a long speech, and he did not boast about the first class like other teachers in other schools.

Teacher Liao took five minutes to explain the content of the course,

Exam method, brief answer. He didn't say what projects he had participated in, and what awesome students he had brought out.

These things are all imaginary. As Tsinghua teachers, they can't finish the list of honors in two classes.

But they are completely unnecessary.

With that time, it is better to talk about two more questions to be more realistic.

"Come on, let's take out the textbook and read the first chapter." Teacher Liao said to everyone while opening the ppt courseware.

The first chapter of "Advanced Algebra", polynomials.

The first section, the number field.

The second section, the concept of divisibility.

...

Teacher Liao lectures very fast.

How fast is it?

In some places, the teacher Gao Dai on the stage has already finished speaking.

But off the stage, many people still couldn't find where this theorem is in the textbook.

Formulas, theorems, and example problems were instilled into the brains of more than 30 students in the classroom by Mr. Gao Dai.

In each section, Teacher Gao Dai pointed out the key points, and then uncovered one or two typical example questions, and continued to the next section.

Under the podium, every student in the Department of Mathematics is ready for the college entrance examination, looking up to listen, and memorizing something in their textbooks or notebooks.

But even so, there are still only a very small number of people who can keep up with the rhythm of Teacher Gao Dai.

Most of the students were in a dazed state, staring blankly at the dense mathematical symbols on the blackboard.

who am I? where am I? What should I do?

Just like the fat and bearded classmate sitting next to Cheng Nuo.

In the first ten minutes, I was able to keep up with the rhythm of Teacher Gao Dai.

But when he accidentally dropped the pen on the ground, picked it up with his head down, and then raised his head to continue listening to the class.

I suddenly found out that I wanted to cry but had no tears...

Damn, I can't understand it!

In this short period of four or five seconds, Teacher Gao Dai has already explained two or three key steps.

This……

He looked at the pile of mathematical formulas that made no sense to him at this time, and was completely speechless.

In sharp contrast to most of the people in the class, it was Cheng Nuo's side.

The other students were either looking up and listening to the class carefully, or they were taking notes with their heads down.

Cheng Nuo was different.

Although he didn't have a textbook, let alone a preview, he didn't know what the first chapter of the Gaodai textbook was about.

However, this did not prevent him from listening to the class in the slightest.

Students in other mathematics departments thought that the teaching speed was very fast, but for Cheng Nuo, it was just right.

On the podium, Cheng Nuo could quickly grasp every formula and concept that Mr. Liao uttered.

Cheng Nuo basically glanced at those sample questions and calculated them in his mind. The steps are basically the same as what Mr. Gao Dai said.

As for notes or something, they don't exist! It is impossible to take notes, and it is impossible to take notes in this life. I can only rely on occasional full marks to maintain my life.

brain! It is Cheng Nuo's best notebook! If you want to use any knowledge point, you don't have to bother to look through the notes, just call it out of your mind.

Why! there's no way!

Cheng Nuo sighed. With the halo of being a top student, even if he cheats like this, he is also very helpless!

Cheng Nuo also took advantage of Teacher Liao's lecture, drank some water, and chatted briefly with Mu Leng for a while. He looked up, roughly scanned the courseware and the formulas on the blackboard, and was able to keep up with the progress of Teacher Gaodai.

Youzaiyouzai, beautiful!

In the whole classroom, Cheng Nuo was probably the only one, so he was so relaxed and leisurely.

The scariest thing was that Cheng Nuo... was a student of the finance department!

"Advanced Algebra" Chapter 1 Polynomials, a total of eleven sections, fifty or sixty pages!

Liao Zhixing finished speaking in less than half an hour.

Yes, indeed, it only took half an hour!

This is the legendary Tsinghua speed!

Rather than finishing the lecture, in the eyes of the students in the mathematics department, it is better to say that it was just read from beginning to end.

In terms of theory, they almost got a rough idea.

But when it comes to actual combat, it is still a false proposition whether they can skillfully apply these theorem knowledge when doing specific topics.

On the podium, Liao Zhixing threw only a small piece of chalk on the podium, rolled up the sleeves of his suit, and asked everyone with a smile. "Did everyone understand what I said?"

"I understand..."

"No……"

Two different voices sounded from below.

Liao Zhixing smiled faintly, "Do you think my lecture speed is a bit too fast?"

Everyone nodded in unison, except Cheng Nuo, of course.

Liao Zhixing shook his head slightly, "No, no, it's not that I speak fast, but that you understand too slowly. I just saw that when I was lecturing, many students kept their heads buried in taking notes. Instead, they kept their heads up There are very few people attending the class.”

"I don't object to you taking notes, but you must always take notes. Don't ask me to say anything, just take notes."

"and also……"

blah blah blah blah~

Liao Zhixing talked a lot with earnestness, "The current speed is only the most basic speed. If it is not for fear that you will not be able to keep up, I am going to finish half of the book in one class."

One class, half a book!

The whole class had the idea of ​​dying.

Although, they are all academic masters who have emerged from millions of candidates across the country. But it's just ordinary people!

One class and half a book, even if this year's college entrance examination champion is called, it may not be able to bear it!

"Okay, no matter what you understand or don't understand, let's practice with two questions first." Liao Zhixing opened a ppt, and a question appeared on it:

Find all polynomials with complex coefficients such that f-ff=0.

The topic is short and seems simple at first glance.

But often, the simpler the problem looks, the more difficult it is to calculate.

"This question is a bit difficult. You guys should try it first. I'll ask my classmates to answer it later." After speaking, Liao Zhixing picked up the thermos cup soaked with wolfberries and sipped it.

Tsinghua's senior teachers are all called difficult questions, and their difficulty coefficient must not be underestimated!

This is a stubble!

However, since they chose to apply for the Department of Mathematics, they were already prepared to face a series of difficult mathematical problems.

Under the podium, students from the Department of Mathematics took out paper and pens one after another, lowered their heads, frowning, and calculated on the paper.

In the classroom, apart from the sound of the pen nib rubbing against the paper, no other sound can be heard.

The chubby classmate with the beard is also writing and drawing on the paper with his head down.

Although, he didn't understand much of the previous content, and he didn't know what he was calculating.

A minute later, the clueless chubby classmate threw the draft paper aside as if discouraged.

Just as he turned his head to check on the progress of other students, he suddenly saw Cheng Nuo sitting beside him, who was completely in two worlds with the surrounding environment!

What puzzled the chubby student was that Cheng Nuo, who was sitting next to him, seemed unmoved while the other students were immersed in solving the problem. Resting his head on his hands, his eyes drifted away. There is nothing on the table except a notebook. Yes, there are no textbooks or pens.

And the notebook is also blank.

This made the chubby student wonder how the guy next to him got into Tsinghua University.

I tried my best to listen to it! Although...it's still a tragedy and I don't understand! But after all, I tried my best!

But you, a guy who doesn't even bring textbooks, take notes, and do homework, is a bit too much!

I'm still in class now, which is a bit inconvenient.

The fat classmate decided that after class, he must give a good lecture. Let Cheng Nuo know his way back, don't waste his studies, and become a person useless to society.

five minutes later……

There are still ten minutes until the end of get out of class.

Liao Zhixing stopped everyone from answering the question, leaned on the desk, and asked with a smile, "Okay, is there anyone willing to volunteer to come up and solve this question?"

Silence, the silence of a needle drop.

No hand was raised, and no one answered.

Liao Zhixing's expression showed a little embarrassment. "It seems that everyone is very shy!"

"If that's the case, then I'll just call a classmate!"

After speaking, Liao Zhixing glanced around the classroom.

Before he could solve the problem, the chubby classmate, who was already guilty, lowered his head like an ostrich, wishing to lower his head into the soil.

Liao Zhixing's gaze, after scanning the classroom for a week, suddenly fell on the fat classmate.

The chubby classmate who was lowering his head suddenly felt his chrysanthemum tighten for no reason.

"Come on, that fat classmate, come up and explain this question to everyone."

The chubby classmate raised his head, looked around, and pointed at himself.

"Yes, that's right, it's you, that chubby classmate who wears glasses!" Liao Zhixing said with a smile.

The chubby classmate got up with a face of extreme reluctance, and stood there blankly.

"This fat classmate, come here and share your problem-solving ideas with everyone. Only by brainstorming can we make progress together!" After speaking, Liao Zhixing looked at the fat classmate with encouraging eyes.

The chubby classmate hesitated for a moment, and said bravely, "Teacher, I...I can't!"

"No?" Liao Zhixing was taken aback, "This...by the way, what's your name?"

"Li Xiurui." The fat classmate said weakly.

"Student Li Xiurui, fat, yes, that's what I'll call you from now on."

Li Xiurui has black lines all over his head.

Teacher, you can just call me by my name directly, and the two modifiers in front are unnecessary...

"You shouldn't!" Liao Zhixing walked back and forth on the podium, teaching dutifully, "It's good that this question is difficult, but as long as you understand and understand everything I said before, you still can't solve this question. question."

"Teacher, I..." Li Xiurui said.

Teacher Liao raised his hand to stop him, "If you don't believe me, just ask anyone else in our class to see if he can solve this problem. If not, it means that there is indeed a problem with my lecture speed. , it means that your basic knowledge is not solid enough.”

"Then I choose him!"

Li Xiurui pointed, without hesitation, he chose Cheng Nuo who was sitting next to him!