universal data

Chapter 223 Is it him? !
"Then I'll choose him!" Li Xiurui pointed at Cheng Nuo.

Cheng Nuo, who was wandering outside and not knowing what he was thinking, felt Liao Zhixing's gaze on him, and the expression on his face couldn't help but be startled.

Cheng Nuo couldn't figure out the situation and stood up from his seat.

Liao Zhixing nodded, pointed to the question on the PPT, and said to Cheng Nuo with a smile, "Classmate, can you do the question above?"

Cheng Nuo hesitated for a moment, "It should be considered possible!"

The gloating expression on the fat Li Xiurui's face suddenly froze.

No way!
Just now, he really saw that after Liao Zhixing asked everyone to start doing the questions, Cheng Nuo did nothing but read the questions for a while.

My notebook has been clean since class.

How could such a guy solve this problem.This guy is not pretending!

Liao Zhixing didn't care what Li Xiurui was thinking at the moment, seeing Cheng Nuo giving himself an affirmative answer, he waved to Cheng Nuo with a smile, "In that case, this classmate, come up and tell everyone about yourself Let’s solve the problem.”

The expression on Cheng Nuo's face was a little unnatural.

Originally, I went to the wrong classroom, not a student in the mathematics department.

According to Cheng Nuo's original plan, he planned to finish the first class safely, and then sneak back to the original classroom during the break.

but now……

Now that Liao Zhixing had called him, Cheng Nuo had no choice but to bite the bullet.

A student from the finance department came to solve an advanced problem only learned by the mathematics department, it should be... no problem!
I just don’t know, if the mathematics students in the classroom know, a difficult problem that makes them think hard, will be told to everyone by a financial student who can’t beat it.What will be the expression on the face.

"What, is there a problem?" Liao Zhixing saw Cheng Nuo's face and let out a sigh.

"no no……"

never mind!let's go!
Cheng Nuo bit the bullet and walked to the podium step by step with great reluctance.

To be honest, Cheng Nuo really doesn't want to be in this limelight!

"Come on, classmate, let's start your explanation!" Liao Zhixing took the initiative to give up the position of the podium to Cheng Nuo, standing on the side near the door.

The first row of the classroom.Racking his brains, Zhao Yang, who had just solved the problem in seven or eight minutes, heard Liao Zhixing say that a classmate in his class started to explain the problem.He slowly raised his head while wondering who was able to figure out the problem in such a short time.

However, when he saw the familiar figure standing on the podium, his mouth opened wide and his eyes suddenly shrank as if he saw something unbelievable.

I wipe!This guy... how could he appear here!
Zhao Yang looked around hastily.

That's right, this is the classroom of the mathematics department!It is also about "Advanced Algebra"!

He knew Cheng Nuo and Zhao Yang.

Just about a week ago, on the shooting range, Cheng Nuo rubbed Zhao Yang's spear skills hard on the ground.

If he remembered correctly, Cheng Nuo should be a freshman in the Department of Finance!
What kind of thing do you want to do when you come to the classroom of our mathematics department?

I said you came and you came, but you still ran to the podium to give a lecture.

A finance student lectures a group of math students on a math problem.

This... is indeed a bit too much!
On the podium, Cheng Nuo naturally saw Zhao Yang sitting in the first row at a glance.

The eyes of the two met each other in the air.

Cheng Nuo grinned, revealing a row of neat and white teeth.

Zhao Yang kept a cold face and remained silent.

Kick the restaurant!
In Zhao Yang's mind, he thought Cheng Nuo was here to kick the restaurant.

but……

Their mathematics department restaurant is not that easy to play!
If the strength is not enough, it can only be a joke.

Thinking of this, Zhao Yang calmed down.He folded his arms and quietly watched Cheng Nuo standing on the podium.

Topic!

It wasn't the first time Cheng Nuo had done this.

He took a breath, picked up a piece of chalk, and with a few swipes, wrote the title exactly on one side of the blackboard.

"Find all polynomials with complex coefficients satisfying f(x)-f(x)f(x+1)=0?"

Perhaps in the eyes of other students in the Department of Mathematics, this question is not for students like them who have just taken the advanced class on the first day.After all, it's only 30 minutes, and they're not monsters.

It is good to be able to understand the knowledge taught by Mr. Liao, but there is still a long way to go for proficient application.

Therefore, as a student of the Department of Mathematics, it is far from enough to listen carefully in class!
If you want to achieve impressive results, you must devote your free time every day to the great cause of mathematics.

For example, when going to the toilet, while urinating, construct the equation of a parabola in your mind and calculate the correct landing point.

When you are XXOO with women's tickets, don't forget to use the spherical equation to calculate the size of the cup, and at the same time calculate your length and the depth of the women's ticket. The gap between them is the Peyano remainder in Taylor's formula, Schlemilch-Rosch (Schlomilch-Roche) remainder, or Lagrangian remainder, or, Cauchy remainder!

Cough cough, back to the topic, back to the topic.

Since it was a lecture topic, Cheng Nuo couldn't patronize writing on the blackboard alone.

A smile appeared on the corner of his mouth, which he thought was very sunny, and he turned sideways to the more than 30 mathematics students under the podium, speaking while writing.

"Actually, this topic can't be described as complicated."

"First of all, when f(x) = 0 and f(x) = 1, this equation obviously meets the requirements, there is no doubt about it."

"So, the remaining focus is to discuss the case where the number of times is greater than 1. Right?"

Under the podium, everyone in the mathematics department nodded in unison.

Everyone knows this.

However, the crux of the problem is how to discuss multiple situations where the number of times is greater than 1.

Cheng Nuo was talking and writing on the blackboard.

"From f(x) = f(x)f(x+1), if a is the root of f(x), then a is also the root of f(x), that is, a is the root of f(x)."

"Then a, a, (a), ((a)), ... are all roots of f(x)."

"But if f(x) is non-zero, there are only finite roots, and there is m less than n, so that a^m = a^n, then a^m·(a^(nm)-1)= 0, there is a=0 , or a is the unit root,..."

Cheng Nuo's speed of lecturing was very fast, almost as fast as Liao Zhixing's.

Under the podium, most people could barely keep up with Cheng Nuo's problem-solving speed.

In the first row of the classroom, Zhao Yang, who was sitting on the far side, wiped the sweat from his forehead, lowered his head and wrote vigorously to verify Cheng Nuo's calculation steps, trying to find out the shortcomings in Cheng Nuo's explanation steps.

Beside the podium, Liao Zhixing looked at Cheng Nuo, who was talking endlessly on the podium and had quite a bit of his own style, and nodded with satisfaction.

Well, this child deserves to be focused on training!

Liao Zhixing felt that it was necessary for him to pay more attention to Cheng Nuo in the future.

(End of this chapter)