Xu Yi walked through the door without saying a word. Suddenly, everyone was paying attention. The oily middle-aged man stared at Xu Yi. Xu Yi came closer and whispered, "The principal is looking for you. It's urgent."
After saying that, he turned around and left.
The oily middle-aged man was startled, and then waved his hand and said, "Everyone, study by yourself first. The homework is the after-school exercises of unit three. When the bell rings, everyone goes on their own."
After saying that, he hurriedly chased Xu Yi, "Hey, who are you, teacher? Why haven't I seen you before?"
He looked at Xu Yi's cool and frivolous short-sleeved shorts and murmured in his heart.
Xu Yi said, "I'm School Office, the new Teacher Xu, Discipline Inspection Secretary Cui is at School Office, hurry up, I think Secretary Cui is quite angry."
He remembered the names of the school leaders very well when he passed by the school affairs column at lightning speed.
The oily middle-aged man's body suddenly softened. Xu Yi supported him and said, "When things come to a close, you won't want to just walk away. Think about your own problems and strive for leniency."
"I, I really..."
The oily middle-aged man still wants to cry.
Xu Yi sighed and said, "I'm also soft-hearted, okay, you go and wash up quickly. This sweat will help you calm down."
The oily middle-aged man, as if he had received an amnesty, ran towards the rest room in a panic, followed by Xu Yi.
After running up to the backmost room on the sixth floor, the oily middle-aged man opened the door. Xu Yi then entered, closed the door, and pulled the oily middle-aged man to sit on a chair. "Brother, don't ask anything, just tell me about calculus."
The oily middle-aged man was confused and stared at Xu Yi like a monster.
Xu Yi didn't have time to explain to him, so he took out a kitchen knife that he had picked up when he was walking through the residential area. Without saying anything, he slashed his arm, ripping open the skin and revealing a horrific wound.
There is no blood and it is more impactful. The oily middle-aged man suddenly became quiet and no longer bothered about why Xu Yi did this.
He only knows that if he can be so cruel to himself, he can be even more cruel to others.
Xu Yi grabbed the pen and paper on the table and quickly reproduced Hat Man's question on the paper, "Can calculus be solved?"
The oily middle-aged man snatched the gel pen from Xu Yi's hand, took out a new piece of manuscript paper, and began to list the calculation formulas on the paper. He muttered, "Calculus is not enough, this also involves a problem of curvature, and the knowledge points of limits and indefinite integrals must be used..."
After brushing and brushing for just over a minute, the oily middle-aged man finished his work and listed out the final results.
Xu Yi took the piece of paper and couldn't understand it at all.
He knew that this was because he had no foundation in relevant knowledge, so he dragged his middle-aged self to start talking about calculus.
The oil-headed middle-aged man is extremely old, but he can't use the Xu Yi vegetable blade. He can only start from the beginning of calculus.
Unexpectedly, Xu Yi's understanding ability is astonishing. Often he only starts from the beginning and points out the key points, and Xu Yi can continue to repeat the story. When encountering a bumpy road, he will point out a few more sentences, and Xu Yi will suddenly understand again.
Xu Yi mastered the entire calculus knowledge in just half an hour.
Again, mathematics is a technology as well as an idea. Once you have a profound mathematical idea, it is not difficult to master specific technologies.
And Xu Yi chose to rush to the university instead of going to an Internet cafe to study calculus on Baidu. This was because he anticipated the problems he might encounter during the study process and needed someone to answer them in a timely manner.
After discussing calculus, the oily middle-aged man began to talk about curvature, limits, indefinite integrals, Lagrange's Theorem...
The speed at which Xu Yi was mastered made the oily middle-aged man secretly stunned. He even wondered if all this was a prank. Otherwise, why would this person come to discuss such superficial mathematical knowledge with him when he clearly had such terrifying mathematical abilities.
After Xu Yi understood all the relevant knowledge points to solve Hat Man's problem, he casually wrote down a few mathematical problems in the world of cultivation that he couldn't figure out.
The oily middle-aged man said, "What on earth are you talking about? I can't even understand the question. It's too complicated. You have to go to Department of Mathematics."
The answer of the oily middle-aged man verified Xu Yi's guess that the mathematical ability of this world may not surpass that world, but as far as mathematical tools are concerned, the mathematical tools of this world are really sharp.
"If there are any other mathematical tools similar to calculus, let me know. Hurry up!"
Xu Yi gestured with the kitchen knife in his hand. The oily middle-aged man shivered in fear. He really didn't understand how the guy in front of him perfectly combined the two images of being thirsty for knowledge and being vicious.
Suddenly, Xu Yi's eyes glanced at the thick bookshelf on the left wall. He rushed forward and began to search. Soon, he locked on a tome about functions and began to study.
He was flipping through the pages and asking questions at the same time. It was often at the beginning that a lot of basic mathematical knowledge needed to be reconstructed. Once the construction was completed, he flipped through the tome as fast as a banknote counting machine.
In the blink of an eye, three hours passed. Xu Yi finished reading more than ten tomes in a row. He also read the remaining books because they were not challenging and not worthy of his study.
Suddenly, Xu Yi thought of the library. There were so many tomes there, which condensed the crystallization of human wisdom in this world. Looking at the oily middle-aged man again, he suddenly felt that this person was a bit unsuitable. It would be great if he could tie up Shing-Tung Yau and Terence Tao. Unfortunately, he didn't have enough time, so he planned to tie up an old professor first.
"Brother, who is the number one guy in the math department in our school?"
Xu Yi stared at the oily middle-aged man and asked.
The oily middle-aged man rolled his eyes and understood what this man was planning. He wished Xu Yi could go find someone else. As for what happened to others, he really couldn't control it. The scene in front of him was too terrifying. At worst, he could just call the police on the old professor's behalf after he escaped.
The oily middle-aged man was about to speak when the clouds in the sky outside suddenly tilted, and countless screams were heard. Xu Yi violently pulled the door open, and the sun suddenly hit the ground from the sky, and screams broke out.
At this moment, a sharp handprint came, and Xu Yi had no room to escape. Being hit by the Great Hand Seal, his consciousness suddenly fell into darkness.
"Wake up, wake up, finally wake up..."
"The morning is like blue silk and the evening is like snow, and thinking hard is so painful."
"With the decline of Qi, one's lifespan may be nearly a hundred years old if it is lost in one fell swoop."
"Mr. Xu, are you okay..."
"..."
After all the chaotic noises reached his ears, Xu Yi opened his eyes and felt that his body was extremely heavy.
A few strands of silver hair fell down. He stretched out his hand to grab the hair. He was shocked at first by his hand with bulging muscles, full of ravines and chicken skin.
He took out a mirror. In the mirror, he was as skinny as firewood, with ridges all over his face and swaying black hair. He looked older than a centenarian among ordinary people.