Scholar's Cultivation System Panel
Chapter 108 Xu Shen was stumped
"You are also people who often take exams, so I won't say anything unnecessary today."
"Anyway, don't even think about cheating."
"The professors and leaders of the college can use surveillance to watch."
nine in the morning.
In the ordinary differential equation examination room of the Excellence Building, the invigilator on the podium unpacked the test papers and said commonplace things to the candidates below.
The final exam is not only related to whether you can graduate smoothly, but also a reference item for the selection of welfare and honors such as scholarships. To ensure fairness, Jingzhou University has always been very strong in proctoring the exams.
No instances of cheating are tolerated.
If found, at least one punishment will be given.
Serious cases will be dismissed directly.
As the invigilator said, it seems that there are only one or two invigilators in the classroom, but in fact, there may be many people sitting behind the monitor, and sometimes the dean even comes to take a look.
To ensure the smooth conduct of the exam.
Unlike the freshman who didn't understand the powerful relationship in it, the sophomore has gone through a lot of exams, as long as someone is not confused and can't think about it, he will basically not do such troublesome things.
After the test papers are taken out of the paper bags, they will be distributed soon.
Xu Yun maintained a calm and steady state of mind. After getting the papers and writing the candidates' information, he checked the question types.
Suddenly a familiar voice sounded in front of him.
"It's you again, classmate Xu Yun, how many minutes earlier do you plan to hand in the paper this time?"
Lift your eyes and look.
I don't know when the invigilator came over.
Taking a closer look, he discovered that the other party was his statistics teacher who invigilated the midterm exam.
Although he is only in his thirties, he is a young lecturer at Peking University, but his teaching level is not low.
In addition, as a female teacher, she has a gentle temper and is very popular with students in class.
Xu Yun knew that in order to catch up with Xu Chongxing's open class last time, he handed in the paper early to impress the other party, but there was no standard answer for this kind of question, after all, he hadn't had time to see the difficulty of the question.
He smiled politely, and replied shyly, "It probably depends on the difficulty of the test paper."
"Then you have to work hard."
"Teacher, I hope you can break the previous record." The invigilator specially said this to Xu Yun, and then moved away from his position.
Except for Xu Yun in the examination room, although they are all sophomores, most of them know Xu Yun.
Not to mention that Xu Yun took a lot of professional courses with them, but the popularity of the Internet some time ago has also become a well-known figure in the school.
However, they were all suffocating in their hearts, that is, no matter what they said, they couldn't let Xu Yun kill like he did in his freshman year.
Get the first place in the grade.
As a sophomore in the 14th class, if they are beaten by a freshman, how can they hang around in the college in the future.
For this reason, they specially held a meeting in the group in private, and finally handed over this task to a few people with the best grades.
So when I heard the conversation between Xu Yun and the invigilator, I couldn't help clenching my teeth subconsciously.
It's just too crazy.
Xu Yun didn't know what the seniors in the examination room were thinking. As the examination officially started, with the help of his concentration ability, he quickly immersed himself in the examination papers. When he glanced up, the examination questions were reflected in his mind like a camera. Capabilities start parsing.
Abstract thinking dissects the appearance and gets the essence directly.
Spatial thinking quickly builds mathematical models in the mind.
Numerical calculations yield results.
It is no exaggeration to say that he is now like a humanoid computer.
You don't need to use your pen to do calculations, and you can calculate the problem-solving ideas and answers in your mind.
Just copy it down.
And this kind of problem-solving speed is absolutely unmatched by others.
The differential equation test paper of the Department of Mathematics of Peking University is relatively neat, with only two large blocks in total.
Calculations and solutions.
As for the difficulty, it is similar to previous years' big questions.
With a two-hour time limit for answering questions, Xu Yun completed 90% of the content of the test paper in a few tens of minutes.
Only the last big question remains.
"Assuming f(x) is continuous, the curve y=f(x) is a convex arc connecting A(0,1) and B(0,1)..."
"p(x, y) is its previous point..."
When the question came into view, he knew it was a differential equation problem.
"Find the equation of the curve?"
"It's not difficult."
I muttered to myself, and immediately substituted the data in the question to generate a graph in my mind. As the idea of solving the problem gradually became clear, I immediately started writing.
The equation is obtained by subtracting the area of the trapezoid from the area of the arc segment.
Then differentiate both sides with respect to X.
Simplification.
Solve differential equations.
After finishing the entire test paper soon, he first looked up at the time on the wall, and found that there was still a long time before the stipulated time for handing in the paper.
Just when he was hesitating whether to hand in the paper in advance, his eyes fell on the steps of solving the questions in the test paper, and he suddenly felt that there was a better solution to this question, and he immediately became interested.
"Is there more than one solution, why not try them all?"
Thinking of handing in the test paper early and not having time for dinner, it is better to try to write out all the solutions to the big questions on the test paper.
See how many are found.
Doing so can also diverge your thinking better and increase your understanding of relevant content.
The second method of solving the problem must not be written in the test paper, so he dug out the draft and studied it carefully.
After a while, two ideas for solving the problem were identified.
As he gradually immersed himself in it, his own character that likes to meet challenges was stimulated, even if he fell into deep thought, he still had to find all the solutions to the problems.
...
Zhang Xiaoyuan is a sophomore majoring in Mathematics and Applied Mathematics.
In the second year of high school, he was recommended to Peking University because of his outstanding talent.
He was about the same age as Xu Yun, and he also maintained the first grade in his grade.
Because Xu Yun studied the professional courses of the sophomore stage in advance and took the final exam with them, in this case, he, a top student, had to stand up and protect the dignity of his seniors.
This is also the high expectation placed on him by others in the department.
But he has to admit that he is not fully sure of himself, and he is not sure whether he can surpass Xu Yun in the final exam.
After all, Xu Yun's aura in the past six months is too dazzling.
No matter publishing a paper in the first area of the Academy of Sciences, or independently developing image restoration software to establish a company.
He doesn't have it yet.
The only thing that can be obtained is that he has already completed all the courses of the sophomore stage.
It stands to reason that he should be stronger than Xu Yun in doing the questions.
Originally, he was worried that Xu Yun would hand in the test paper before him, and he was a little nervous, but he didn't expect that Xu Yun would still be immersed in the calculation after he finished writing the test paper, with a serious expression on his face.
"It's not finished yet?"
"Could it be that he was stumped by the big question?" Zhang Xiaoyuan watched Xu Yun and suddenly this idea came to his mind.
Then he nodded in self-affirmation.
"I guess so."
Thinking that Xu Yun has only been in school for half a year after all, it is not easy to be able to teach himself high algebraic fraction and analytic geometry, and it is completely understandable that he does not have a deep grasp of ordinary differential equations in his sophomore year.
He breathed a sigh of relief when his thoughts stopped here, and the pressure of defending the prestige of the senior disappeared instantly.
Originally, he planned to hand in the paper early, but now he has no such idea.
Sitting in the seat, always pay attention to Xu Yun's performance.
Seeing that Xu Yun was still burying his head in calculations until the paper was handed in, his heart finally settled down completely.
The honor of first grade this time must belong to him.
In the next few exams, Zhang Xiaoyuan continued his previous practice. After finishing the test papers, he looked at Xu Yun and found that Xu Yun was still counting until the time of handing in the papers. This made him more sure that Xu Yun, as a freshman, was right The content of the course content in the sophomore stage is not strong enough. So when you encounter a big problem, you will get stuck and waste a lot of time.
Perhaps because he lost the pressure in his heart, he took the initiative to talk to Xu Yun after the last exam.
"Hello, classmate."
"I am a sophomore majoring in Mathematics and Applied Mathematics."
"Hello, senior."
Xu Yun asked the company to help him book a ticket back to Pingzhou today. After the exam, he was about to go back to the dormitory to pack his things, but he was stopped by a boy wearing black-rimmed glasses.
Thinking of not hitting the smiling person with his hand, he stopped and said hello.
"This year's exam questions are indeed a little difficult, and I finished them half an hour earlier."
"You don't have to think too much, junior."
"See you next year."
After patiently listening to the other party's words, several question marks suddenly appeared in Xu Yun's mind.
"what's the situation?"
"Are the questions difficult this year?"
He revisited the big questions he had done, but he couldn't find any one that could be called difficult.
On the contrary, he only found three or four solutions to each question at most, which made him quite unwilling.
Just as he was about to respond, he saw that the other party had already turned and left.
"baffling."
He murmured something softly in his mouth, so he had the right to treat it as a small episode and be too lazy to think about it.
Not long after returning to the dormitory, I saw that Qian Yudong, Zhao Yuefeng and Zhou Qi had already packed their things, with a few suitcases parked in the middle.
"Xu Yun is back, then I will go to the station to catch the train before you."
"Bros."
"See you next year."
Seeing Xu Yun, Qian Yudong didn't stay any longer to waste time, and after speaking, he pulled up his suitcase and walked out of the dormitory.
Seeing this, Zhao Yuefeng poked his head out and shouted, "Remember to bring us some specialties, Brother Dong."
Qian Yudong raised his hand as a gesture of no problem, and quickly disappeared from sight without stopping.
Then Zhao Yuefeng and Zhou Qi also left one after another, Xu Yun stayed in the dormitory alone to pack up his things, then locked the door of the dormitory and set foot on the way home.
Take a bus from the station to Pingzhou City, then transfer to a bus to Yuanshan County and get off on the way.
Because of the short distance, we arrived at the greeting station before dark.
Xu Yun got off the car with his luggage and just raised his eyes to see his mother standing by the tram not far away. Even though the weather was approaching below zero, he still couldn't hide the joyful smile on his face seeing his son.
Before returning home, he told his mother about his approximate arrival time, and specifically asked not to come too early.
But now it seems that I am afraid to stand for a while.
He hurriedly walked towards his mother with his luggage, his eyes fell on his mother first, and he frowned slightly and said, "Are you wearing thick clothes? It's cold outside these days."
"Don't worry about it."
"My mother is a child, so I don't know how to add clothes." Wang Chunfang took a look at her son and immediately greeted her: "Hurry up and get in the car, it will be dark later."
...
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