I Am the President of the University

　　 How terrible is the +50% learning perception?

　　For example, the teacher is explaining topics, and the number of topics that can be understood varies according to each person's understanding.

　　 For example, student A, originally can only understand 50 questions, with a 50% perceptual bonus, then he can rise from 50 questions to 75 questions.

　　 And student B, originally can only understand 100 questions, after the addition, the understandable questions instantly become 150!

　　 Originally the difference between student A and B was 50 questions, after the addition, the difference between the two directly became 75 questions!

this means……

　　 Smart people, after the bonus, will be smarter!

　　Therefore, the distance from ordinary people is greater...

　　Because there is only one big class in the morning, it is only 9:35 after finishing.

　　 Zheng Tianyu directly awoke the two sleeping roommates, and then the six people in the dormitory walked slowly on the way back.

　　 At this point, there is no need to go to the cafeteria to queue up. Zheng Tianyu and her roommate are walking along the road to discuss the problem.

　　 Except for the 2 sleeping people, the other 4 were listening carefully to the class.

　　 Although Guanghua University is only a private two-college university, it will not fall so quickly when you just enter the school. Generally speaking, they are bold at the beginning of their sophomore year, but they become an old fritters that can't be moved by the third year.

　　 Zheng Tianyu and Zhang Lei all understand, but the other two roommates are still a little confused.

　　Chen Chu, wearing a champion outfit, walked along and asked Zheng Tianyu and Zhang Lei: "I didn't fully understand the proof that the teacher just said. Who of you understands and tells me?"

　　 "Which topic?" Zhang Lei stepped up confidently, thinking that he had understood everything in the class today.

　　 Although Zheng Tianyu didn't speak, he turned his attention back.

　　 "It is the proof that the equation x^5-5x+1=0 has and only has one positive root less than 1. I don't feel that this topic is very understandable." When Chen Chu spoke, his brows frowned slightly.

　　 "This question is not difficult!" When Zhang Lei asked this question, he just understood it by himself, and started to explain with joy.

　　" Just use the zero theorem directly.

　　 Let f(x)=x^5-5x+1

　　 Obviously the function is continuous and derivable in the real number domain, we take the interval [0, 1]

　　F\'(x)=5x^4-5=5(x^4-1)

　　When 00, f(1)=1-5+1=-3＜0

　　According to the zero-point theorem, there is ξ on (0,1) such that f(ξ)=0.

　　 is also monotonically decreasing, so there is only one root such as ξ.

　　 So the proposition is proved! "

　　 After Zhang Lei finished speaking, Chen Chu had an epiphany and said gratefully: "Thanks, I understand now! I will invite you to drink milk tea at noon later!"

　　 "Hey, what a big thing, help each other, Old Zheng, don't you think?" Zhang Lei smiled, squeezing his brows towards Zheng Tianyu.

　　 Zheng Tianyu smiled, this guy started to feel horrible again, but the answer was indeed correct, and he replied:

　　 "Yes, yes, right."

　　 Shi Ze on the other side was surprised. He stopped playing with his mobile phone. After putting it away, he came up and patted Zhang Lei's shoulder and said, "Zhang Brother Niu, hehe, I will copy the notes when I go back."

　　 Zhang Lei did not refuse, and directly agreed readily: "No problem!"

　　 This guy is a good face, but he is pretty good. Except for being forced, there is no other problem.

　　 Just when Zhang Lei felt that he had a high score this semester, another roommate who had not spoken out spoke.

　　 "Zhang Lei, the proof that lim{x→+∞}f\'(x)=lim{x→+∞}f\'\'(x)=0, would you not?"

　　 "This question... well, let me think about it."

　　 saw the dormitory building right in front of him, but Zhang Lei’s originally relaxed expression was a bit...

　　 is like constipation...

　　 He scratched his head, thinking for a long time, his mouth opened and closed.

　　 Organized the language for a long time, but still didn't say it.

　　 [The egg hurts, I can barely understand this question, how should I explain it? ! 】

　　 Zhang Lei thought to himself, and suddenly became a little impatient.

　　 And several roommates, except Zheng Tianyu, the others are looking at him.

"This question...this question...cough cough, it's not easy to explain. Actually, I can barely understand it. I'm sorry Aaron." Zhang Lei hesitated and blushed, really unable to explain this question. , In the end he still told the truth.

　　 After confessing, Zhang Lei felt more comfortable.

　　 mentioned this question is Tao Yalun, the youngest in the dormitory, from Handong.

　　 The other party's personality is just relatively quiet, not very talkative, and has a good personality.

　　 Tao Yalun smiled slightly and said, "It's okay, I will download it to Baidu after I go back."

　　 Zheng Tianyu, who was watching everything, smiled and didn't say anything. After all, he didn't even ask about himself. What he said directly was a bit pretending.

　　 A group of people went directly back to the dormitory, and then read books, played games and played games, while Zheng Tianyu was sitting in front of his computer typing codes.

　　 Only half an hour after knocking, a voice came from behind.

　　 "Tianyu, can you tell me the topic just now? Can you tell me if you can..."

　　 Zheng Tianyu looked back, it was Tao Yalun who was standing behind the chair and asked embarrassedly.

　　 It has been a year since I came to Guanghua University. Among the 6 people in the dormitory, Zheng Tianyu and Zhang Lei had better results, the others were average, and Shi Ze was the worst.

　　 "Yes, no problem." Zheng Tianyu replied with a smile.

　　 Then he turned his head, looked around the other four people in the dormitory, and shouted:

　　 "Hey! Brothers, let go of the things in your hands first, Teacher Xiaozheng has started the class~ Wait for a thousand years, miss my life~"

　　 "Huh? Isn't it the end of the expiration date, why did the class start?" Shi Ze sat on the chair and called King Glory. When he heard Zheng Tianyu's words, he looked up and asked in confusion.

　　 2.5 students in the dormitory, Shi Ze contributed 1 and Chen Chu, Tao Yalun and Liu Yi contributed 0.5.

　　 At the end of the term, Zheng Tianyu and Zhang Lei took turns in the dormitory to give these four people a small stove, which led to no one in the dormitory.

　　 Tao Yalun replied to Shi Ze: "Just the question I asked on the way back to the dormitory."

　　 "The proof question?" Zhang Lei, who was lying on the bed reading a book, instantly rolled and sat upright with a carp, and asked Zheng Tianyu: "Old Zheng, what do you know about that question?"

　　 "Ang, I will, and it's not difficult." Zheng Tianyu replied easily.

　　 "I wipe it, it's real or fake, then tell us, I'll get the whiteboard!" Zhang Lei stared wide-eyed, climbed directly off the bed, and then took out the whiteboard neatly and hung it on the back of the dormitory door.

　　 Lock the door again so that you don’t have to worry about someone pushing it open.

　　 After doing all this, Zhang Lei smiled and said: "Mr. Zheng, the whiteboard is ready, you can start speaking."

　　 "About this question, then I will give you a good explanation." Zheng Tianyu stepped forward, picked up the pen, and began to write on the erasable whiteboard.

　　 In the aisle in the middle of the dormitory, five people in the dormitory are sitting and watching with their chairs.

　　 Just as Zheng Tianyu turned his head and started to explain, he noticed that Shi Ze below was sitting but still playing the game with his head down.

　　 He said directly: "Aze, stop playing games."

　　 "That is, Mr. Zheng, you still play games in class, do you want to drop your course?" Zhang Lei sternly criticized Shi Ze, grabbing the opponent's phone and placing it directly on the table.

　　 "Non-war crime..." Shi Ze scratched his head and sighed, mainly because Zhang Lei's last sentence reminded him.

　　He doesn't want to fail the subject, he has to make up the exam, but if he fails the exam, he has to retake it~www.wuxiahere.com~ but he can’t graduate.

　　 Can't finish the job... Go home and get mixed doubles? ! !

　　 With this fantasy, Shi Ze was full of energy, his back straightened and his concentration was 100% concentrated.

　　"How to prove lim{x→+∞}f\'(x)=lim{x→+∞}f\'\'(x)=0?

　　 First, lim(x→+∞)f(x)=C can be set.

　　 For any ε>0, when A>0 exists so that x>A |f(x)-C|A, according to Lagrange's median value theorem, there exists b∈(x, x+2), so that f\'(b)=(f(x+2)-f(x))/2.

　　 then |f\'(b)|≤(|f(x+2)-C|+|f(x)-C|)/2<ε.

　　 Similarly, there is c∈(x+6, x+8), so that |f\'(c)|<ε.

　　 is still based on the Lagrange median theorem, there is d∈(b,c), so that f\'\'(d)=(f\'(c)-f\'(b))/(c-b)

　　…………”

　　Ps: Ask for a recommendation ticket for a reward! Today is one chapter... the remaining chapter will be added tomorrow! This Zheng Tianyu is an important person. In the future, the main line will be scientific research + teaching. Students are awesome, pretending to be force + principal **** and pretending to be force.

　　 The principal's text is not good at writing. I sat in front of the computer at 7 o'clock... Well, I have been checking information and making outlines.

　　Thank you book friends "A Aliyah", "20200906145533199" and "Two hundred catties of fat paper" for their rewards!