I really just want to be a scholar

Chapter 40 Dropped Schoolbag

Qin Ke glanced at Ning Qingyun's blushing pretty face, and immediately looked away. He said to himself, "My goal is to become a god of learning and conquer the stars and the sea", and then took the pen from the girl's hand without squinting. Take the scratch paper again:
"Generally speaking, for such a proposition related to a positive integer n, you can try to start with n equal to a certain n0, first use the construction method to construct an object P(n0) that satisfies the meaning of the question, and then assume that P(n) It has been constructed, and it is proved that P(n+1) can also be constructed... In this way, the complexity can be simplified, and the idea of ​​solving the problem can be found. Look, I will use this problem as an example to explain it to you."

While talking, Qin Ke explained in detail the two proof methods he had figured out, and compared the pros and cons of the two solutions.

Listening to Qin Ke's gentle and confident voice, Ning Qingyun couldn't help but sneak a glance at him.

The side face of the boy under the sun is handsome and full of vigor. Although the natural curly hair looks a bit messy, his face is clean and there is no smell of sweat on his body. There is only a faint smell of laundry soap on his school uniform, which makes him a bit of a clean freak Surprisingly, Ning Qingyun did not feel any resentment.

"The whole proof process can be completed here, do you understand?"

"Understood. You can think of combining the induction method and the construction method. It's...really amazing." Ning Qingyun doesn't praise others easily, because there are too few people who can admire her, but the boy in front of him is good at mathematics. The level is really beyond her reach, and she refuses to accept it.

Qin Ke smiled: "Of course, in specific problems, this proof can be constructive or non-constructive, and you can't stick to stereotypes...'Keep changing', 'adapt to changing circumstances', 'make the impossible possible', This is also the fun of doing math problems. Well, how about this, I might as well give you a class this morning, how about you teach me English in the afternoon?"

This was the original agreement between the two, and Ning Qingyun nodded and said: "Okay."

"What I teach you may be different from what the teachers usually teach you. They start from the type of questions, but I plan to start from the method of solving the questions. After all, your foundation is very good, so it will be more effective..."

Seeing that Qin Ke had been bending over to explain the topic to himself, Ning Qingyun stood up a little embarrassedly: "Why don't you sit down, I'll just stand and listen."

As soon as she stood up, her long ponytail swayed slightly, and the distance between her and Qin Ke was also shortened. The autumn wind blew past, bringing the girl's pleasant fragrance like lime.

Qin Ke couldn't help but think of the phrase "Brother Ke, is Ning Qingyun fragrant" that Wang Lixin, the sullen guy in the dormitory, asked in the "Night Talk in the Dorm". At that time, he lazily replied, "I have rhinitis, Can't smell it."

Qin Ke's nose is of course fine, and even if there is a problem, the system will make it okay when it is attached—so he couldn't help sniffing twice more secretly.

I don't know if it's the scent of shampoo, shower gel or the girl's own body fragrance, but it smells very good anyway.

Realizing that his behavior was a bit perverted, Qin Ke hurriedly distanced himself, pulled a table and chair over, and joined them together: "Let's put it this way, we don't have to stand."

Ning Qingyun nodded.

Seeing that Qin Ke was about to sit down, Ning Qingyun suddenly called out, "Wait."

"Ok?"

"Get out of the way first."

Qin Ke took two steps back inexplicably, and saw Ning Qingyun took out a pack of wet paper towels, and carefully wiped the table and chairs he had brought—these tables and chairs had been placed in the vacant old art room for quite a while. There is a thin layer of dust.

"Okay, you sit down."

"Uh...thank you." Qin Ke couldn't help but look at Ning Qingyun a little flattered. This guy actually wiped the table and chairs for him?This is the treatment he only enjoyed when his little sister Qin Xiaoke flattered him and wanted him to help with errands, right?

Probably because of being embarrassed by Qin Ke's gaze, Ning Qingyun blushed and argued, "I... I have a cleanliness habit, and I can't see dirty things in front of my eyes."

"Thank you anyway." Qin Ke sat down with a smile.

Ning Qingyun rolled his eyes at him, and suddenly thought, wouldn't this be the same table with him again?And in this classroom with only two people...

But at this time Qin Ke was ready to start writing and explaining, Ning Qingyun hurriedly restrained his thoughts and said, "Wait a minute."

She reached for her schoolbag, took out a beautiful notebook and a pen from it, and was ready to record key points before she said, "Okay, you can start."

Seeing this, Qin Ke couldn't help sighing: "You really deserve to be Ning Qingyun."

Ning Qingyun tilted her head slightly, puzzled and said, "What do you mean?"

"Literally. Alright, here we go..."

At present, Qin Ke started from the "returning" problem-solving method of Mathematical Olympiad, and continued to extend it with examples. Basically, he explained in detail according to the context of knowledge instilled in him by the system.

Ning Qingyun has never heard such a novel explanation. Qin Ke not only talks about a method and a sample problem, but also understands by analogy, explaining all possible scenarios and question types that may be used in this method, and strung them into clear knowledge stream.

This is somewhat similar to Ning Qingyun's usual learning method, so Ning Qingyun accepted it quickly and studied it very seriously.

One person concentrates on teaching the other person to learn seriously, completely immersed in the ocean of knowledge, and even forgets the existence of time.

Suddenly, a cough was heard from the direction of the door.

The two recovered from their studies, looked at the door, and saw that it was Old Zheng.

It was only then that Ning Qingyun noticed that she was very close to Qin Ke, her shoulders were almost close together, her face couldn't help getting hot, she sat up straight and put some distance away.

But Lao Zheng shouted at her from outside the door: "Student Ning, come here, the registration form for the Mathematical Olympiad you handed in last time, there is something missing. You participated in the preliminary competition last year and entered the top ten. This must be done in the Mathematical Olympiad." Write it in the column of experience..."

"Okay, Teacher Zheng." Ning Qingyun stood up, and Qin Ke also stood up.

Now they are at the same table, his seat is outside, and Ning Qingyun's seat is inside near the wall, so he has to pass by him to get out.

Qin Ke got up and left his seat, Ning Qingyun whispered "Thank you", and hurried out from Qin Ke, bringing a scent of fragrance.

Qin Ke couldn't help rubbing his nose, um, I can't smell it, um, the stars and the sea are so beautiful.

In order to divert his attention, he habitually stretched his waist and moved his arms and legs.

I don't know if Ning Qingyun got up too hastily and touched the schoolbag, or Qin Ke accidentally touched the table while stretching his arms and legs. Anyway, after Ning Qingjun walked away for a while, her schoolbag fell from the drawer.

Qin Ke saw it out of the corner of his eye, and he didn't even want to reach out and bend down to stop him, but he was a step too late, and the schoolbag fell to the ground with a slap.

This beautiful and clean pure white schoolbag was immediately covered with dust.

Hey, that guy with a clean freak will be sad to see it.

Qin Ke shook his head, squatted down and picked up the schoolbag.

The schoolbag was not zipped, and when it fell, several books fell out of it, and one of them was opened.

Qin Ke picked it up and stuffed it back into his schoolbag, but his eyes glanced at the open book inadvertently, and his eyes widened in surprise.

(End of this chapter)