Chapter 141： Zhang Lei's sadness

"I am the president of the university (

in math class.

The teacher on the podium may have received a salary recently, so he was very energetic in his lectures, and his tone of voice rose a bit.

The people in Zheng Tianyu's dormitory were still sitting together as usual, perhaps inspired by the recent hard work of Zheng Tianyu and Zhang Lei, the other four gradually began to take their classes seriously.

Learning style is easy, it only takes a few days to learn badly, but it may take weeks to learn well.

"Ow~" Shi Ze couldn't help yawning, the advanced math class was too difficult for him.

"Aze, if you're sleepy, go to bed, right? I want to sleep because of yawning all the time!" Roommate Chen Chu looked at Shi Ze with resentment, this guy yawned without sleep for half a class!

Shi Ze had a sleepy look on his face, and insisted: "How can such a sacred place as a classroom be used to sleep!"

Zhang Lei looked at Shi Ze with a look of "dead wood can't be carved", and said jokingly: "I believe it, how long do you think Aze can last? I guess 3 minutes!"

"Five minutes! After all, Aze is a five-point man!"

"Two minutes, no more."

"1 minute!"

As soon as the few friends said their words, Shi Ze was lying on the table.

Tao Yalun, who guessed for five minutes, exclaimed:

"I was careless, I actually believed Azer's integrity!"

Tao Yalun asked in a low voice, "Aze, didn't you just say that the classroom is not for sleeping?"

Shi Ze grumbled and replied: "I'm not sleeping, I'm here to submit study efficiency, strategically supplement supplies, and call me after class..."

Zhang Lei and others have become immune to Shi Ze's "righteous words" every time...

Jumping over Shi Ze, Tao Yalun showed concern on his face and asked, "Old Zheng, how is your digital and analog team running in?"

After all, the two of them recently went to classroom 606 in the teaching building to receive training in their spare time except for classes. They leave early every day and come back late. If Tao Yalun and others knew what Zheng Tianyu and Zhang Lei were busy with, they would have to wonder if they were doing it. What an illegal thing to do.

But... even knowing that he was busy with the digital and analog competition, the four little friends in the dormitory were stunned.

If you are admitted to a private second-class university, 80% of the people will accept their fate.

Maybe you will listen carefully during class, but don't think about self-learning after class.

Except for the month before the final exam, when does the library need to grab a seat?

Just kidding, the library is where couples fall in love and date...

"The run-in is not bad, the classmate in charge of modeling is very good." Zheng Tianyu replied seriously.

Lu Zhou's strength is on the bright side, coupled with his programming level, if he ignores Zhang Lei who is in charge of the thesis, then Zheng Tianyu is full of confidence!

It's a pity that the two gods bring a pit.

Open five to five!

Zhang Lei interjected dissatisfiedly and said, "What does it mean to be in charge of modeling, and my thesis is not bad, okay?"

"just you?"

Zheng Tianyu almost laughed like a pig, "A few days ago, you didn't even know what a paper review was. You told me that it was not bad?"

"Well, it's fortunate that you know about CNKI."

When Zhang Lei heard this, he only felt that he was being despised, and he said uncontrollably: "Zheng thief, today I will have a showdown with you... a showdown!"

"Who is this classmate going to compete with? Come on, come up and compare with this question."

Zhang Lei didn't wait for Zheng Tianyu's reply, but waited for the teacher's voice.

The feeling was too loud just now, so the teacher could hear it.

"Ha ha ha ha!"

The classroom, which had been quiet before, burst into laughter in an instant.

"Come on, come to the podium and solve the problem, otherwise the teacher will remember your name." The math teacher smiled and looked at Zhang Lei.

And all the classmates were watching him.

On the contrary, Zhang Lei, who was in the center of his eyes, was embarrassed.

If there was a crack in the ground, he would definitely get in!

"Old Zhang, hurry up! The teacher is watching you, or be careful to wear small shoes for you!" Zheng Tianyu coaxed excitedly from the side.

"That's right, come on stage and show your strength."

"If you can't solve the problem, don't say that we went out of the dormitory, or it's a shame!"

"Zhang Lei, there are only a few girls in the class, but they're all staring at you. It's time to show off your prowess."

What are friends for? It's for sale!

Several roommates were fanning the flames, especially the last one, which directly stimulated Zhang Lei.

As a computer science student, there are still girls in the class. They are better than mechanics and civil engineers, at least 8:2.

There are only a few female students in the class, as long as they look a little better, they are all treasures!

The single Zhang Lei stood up abruptly and walked to the podium, muttering in a low voice as he walked.

"Look! It's time to show real technology!"

Just walking up, in front of Teacher Laidao, Zhang Lei scratched his head with an embarrassed face, and said, "Teacher, which question?"

The math teacher pointed to the right side of the blackboard and turned on the play-watching mode, "The question on the right, since you can be distracted and chat in class, you must be able to do it, right?"

"It's alright." Zhang Lei found the question and walked over, only secretly pouting when he turned his back to the teacher.

He immediately picked up the chalk on the blackboard and looked at the topic carefully.

[Why when x→0, 1+x under the root sign - 1-x and x under the root sign are equivalent to infinitesimal quantities? 】

"It doesn't seem to be difficult."

Zhang Lei recalled the training in the past few days. Because it was a training camp, all three had to participate.

Even if he is a writer, he is only responsible for thesis writing and defense, and he has to learn mathematical modeling and programming.

And this question... just happened to be no problem for him.

The eyes stay on the topic, and the brain starts to operate at a high speed.

The chalk moved, and the formula was slowly perfected as the powder fluttered in the air...

[lim(x-0)[√(1+x)-√(1-x)]x molecular rationalization

=lim(x-0)[(1+x)-(1-x)]{x[√(1+x)+√(1-x)]}

=lim(x-0)2[√(1+x)+√(1-x)]

=2[1+1]

=1

So √(1+x)-√(1-x) and x are equivalent to infinitesimal]

"Clap clap clap!"

Zhang Lei clapped his hands and turned to the math teacher with a smile that he thought was very nice, "Teacher, I'm done."

I dropped the chalk on my hand, and in a perfect parabola, the chalk swept over the place where the chalk rested on the blackboard and fell to the ground.

The math teacher raised his eyebrows and asked casually, "Is it not difficult?"

Just as Zhang Lei stepped off the podium, he subconsciously replied without thinking, "Fortunately, it's really not difficult."

Then……

A word from the math teacher made him almost fall over.

"I seemed to hear your roommate calling you Zhang Lei just now?"

"Well...you can solve problems even without much listening to the class in mathematics. It's really amazing. I will ask you to answer the questions in every class in the future, so that the students can get to know you more."

Zhang Lei had 10,000 grass and mud horses running overhead.

What **** called my name! !

When I returned to my seat again, I felt the wretched laughter from several roommates and classmates before and after.

Zhang Lei looked up to the sky at an angle of 45°.

"Zhang Lei, why are the corners of your eyes wet!"

Zhang Lei shook his head and denied:

"When I was just solving the problem, the chalk shavings got into my eyes! It's fine, I'll just slow down! Don't pay attention to me!"

ps: Ask for a recommended ticket and ask for a monthly pass!

Woohoo, if the last chapter hadn't been tossed for so long, I would have written all three chapters out.

The takeout hasn't arrived yet, I'm so hungry. . . If I knew earlier, I didn't order takeout and ate it on the road. It's too bad today. . .