I don't want to work hard

Look, look, compare?My eyes are bigger than yours!

Ding Lin glared at Zhao Yueran, warned him to shut up, and then walked out of the office, happy that he had successfully tricked the head teacher, but he couldn't spoil his rare good mood because of this guy.

It's not that Zhao Yueran will see through his acting skills and ask his head teacher to sue.After all, he had no evidence at all, and at this moment, the head teacher who was deeply moved by Ding Lin's determination would not be persuaded so easily.

Back in the classroom, Ding Lin couldn't wait to share it with Xu Xiangyang, but Xu Xiangyang turned pale when he heard it, "Why did you change to study liberal arts!"

"In this way, I can finally completely get rid of the torment of science, and I don't have to face Yang Jingyi at night, killing two birds with one stone!" The happiness came so suddenly that Ding Lin was a little overwhelmed.

But Xu Xiangyang's entire expression collapsed, "Then what should I do, how can you abandon me?"

"Besides language and mathematics, we can still have classes together, can't we?"

"But you've learned literature, who can I ask to copy my science homework?"

Ding Lin looked at Xu Xiangyang speechlessly: "Can't you find someone with good grades to copy? You copied all the wrong questions from me. You might as well do it yourself."

"We didn't rely on copying homework to maintain our revolutionary friendship. Do you have the heart to find someone else?"

"Go away, I won't copy it for you in the future." Ding Lin pushed Xu Xiangyang away in disgust.

Xu Xiangyang paused for a few seconds, then suddenly patted the table: "I've decided, I want to transfer to liberal arts with you!"

"Why are you joining in the fun? You don't even look at your liberal arts grades."

"You are not much higher than me. If you can study liberal arts, so can I!"

Facing Xu Xiangyang's swearing-in pursuit, Ding Lin felt very powerless. He couldn't tell him frankly that he was originally a liberal arts student. I can't understand it.

But the key point is that I can't persuade him, so I can only sigh: "Whatever, you have the ability to persuade the head teacher."

Unexpectedly, Xu Xiangyang really went. He thought he would return home in a hurry, but when he returned to the classroom with a happy face, Ding Lin felt that God had played a malicious joke on him.

"Why did she agree to you so easily?"

"Yes, the teacher has already guessed that I will be with you, and she changed it for me without me having to ask."

Ding Lin: ...

God, earth, I managed to fool the teacher with my actor-level acting skills. Why can Xu Xiangyang change it so easily?What is the law of heaven!

Knowing that he didn't need to entangle with physics and chemistry students anymore, Xu Xiangyang directly threw the half-finished physics test paper into the trash can, took out a political textbook from under his desk, and pretended to read it.

Pack!Do you understand? You!

Although the goal of the first stage has been achieved, Ding Lin knows that he is far from being completely liberated. After all, he promised Yang Jingyi that he will pass all subjects in the next monthly exam. The first shot of the real battle has just started.

At night, Ding Lin hid in his room to do his homework. At this moment, he was stuck with a multiple-choice question on the derivation of a function for a full hour.Ding Lin, who didn't want to admit defeat to Yang Jingyi, took out his sophomore textbook and re-read all the knowledge points of derivatives carefully.

Obviously they are all in Chinese, and you know every word, why can't you read them together?

Several times, Ding Lin frantically wanted to tear up the book, but at the last moment, he suppressed the impulse with reason.

No, you have to be calm, you can't admit defeat, or you will be looked down upon by the old fox!

The clock slowly pointed to eleven o'clock, Ding Lin yawned, and saw that there was still half a page of blank topics behind, this fear of being dominated by the derivative function all night, Ding Lin began to recognize a fact, even if he tonight I can't solve this problem even if I stay up all night and overcome difficulties.

Ding Lin lay powerlessly on the table and wailed in pain.

Why is math so hard!

Finally, Ding Lin gave up the little bit of self-esteem left in his heart, took the initiative to take the paper and knocked on the door of Yang Jingyi's study next door.

"Well, you haven't slept yet?" Yang Jingyi looked up and saw Ding Lin standing at the door, hesitant to speak.

"Uncle Yang, are you busy now?"

It was the first time I heard that Ding Lin would ask him questions in a questioning tone, his voice was mixed with the unique youthfulness of a teenager, and his timidity made people feel distressed.

"Not busy, do you have something to do?" Yang Jingyi closed the notebook in front of him. Now, what else is more important than Ding Lin?

Ding Lin walked in and put the paper in front of Yang Jingyi, "Can you tell me about the derivative."

It turned out that he came to ask him a question, so Yang Jingyi was naturally happy, "Of course."

Ding Lin discovered that Yang Jingyi possessed a kind of magical power, which he could not comprehend after looking at it for a long time, but after being told by Yang Jingyi, he understood everything.Not even their math teacher, Yang Jingyi, could explain it clearly.

"The so-called derivative of x0 is actually to find the limit rate of change at x0. In geometric terms, the derivative is the slope of the tangent line at this point. Then the corresponding slope equation is the derivative function."

"To give a simple example, the square equation f(x) = x, find its extreme value function, we expand its limit function, when the change of x △ x limit tends to zero, then the derivative function of the square equation f'(x)=2x. Now, let's look at your problem, which is also a simple square function, but with more coefficients 2π, so the derivative of this kind of composite function is the same. You can directly import it into the square function In the derivative function, the result will come out."

Ding Lin watched Yang Jingyi solve the problem that had troubled Ding Lin all night in just 30 seconds, and his jaw almost dropped in shock.

"For the derivative function of this common function, you can memorize it after doing a lot. In the later stage, you can choose the answer by looking at the question. The setting of general multiple-choice questions is like this, and you don't need to spend a lot of time. Go to calculate, if it is, then you should reflect on whether you have made a mistake in solving the problem."

Ding Lin was stunned for a moment when he heard this, but every word Yang Jingyi said made him feel very reasonable, and his eyes were full of admiration.

Therefore, since that day, every night when he encountered a problem that he could not solve while doing his homework, Ding Lin would run to Yang Jingyi's side. homework.

One day, Yang Jingyi went upstairs after dinner and found that Ding Lin was already in his study, doing his homework on the table with his buttocks up.

"If you don't have a stool to sit on, don't you feel tired lying on your stomach?"

Hearing Yang Jingyi's voice, Ding Lin immediately raised his head, his eyes flickered with excitement, and his words were palpable, "Uncle Yang, hurry up, help me see if I solved this problem correctly!"

The look in that look reminded Yang Jingyi of the puppy he had when he was a child. Whenever he came home from school, the puppy would rush out excitedly and circle around him.

Yang Jingyi smiled slightly, thinking of a sentence he once read in a book, saying that there is a spring between people, the more you force them to get closer, the farther away they will be, but you relax and retreat, Xiao The guy came back by himself.

"Linlin, are you free this weekend?"

Ding Lin, who was doing his homework, couldn't react to Yang Jingyi's sudden question for a while. He was stunned for a while before digesting the meaning of these seven words. He lowered his head and filled in the answer he had just calculated. You decide."

It was a day's work, but the tutor took up most of the day, and the rest of the time was almost gone after finishing the homework.Ding Lin didn't know why Yang Jingyi asked this meaningless question. Anyway, he had resigned himself to his fate, and even finding time to play basketball became a luxury.

Hey, who made the third-year dog have no human rights?

"Anyway, now that you have chosen liberal arts, you don't need to take tutoring on weekends. If you don't understand mathematics, you can ask me. You can arrange your own time on weekends." Yang Jingyi said, "Of course, the premise is that the school arranges You must complete all your homework."

"Then can I ask my classmates to play basketball together?"

"Without affecting other people's learning, going out occasionally can improve your learning efficiency." Today, Yang Jingyi went to read the learning experience of the third year of high school summed up by those top students in the college entrance examination, and felt that there were some points that made sense.

"Okay, I'm going to ask Xu Xiangyang and the others right now. I promise, I will urge them to finish their homework before they come out to play." It was a pleasant surprise. After speaking, Ding Lin picked up the mobile phone beside him and wanted to send Xu Xiangyang a text message. Go for the good news.

Yang Jingyi frowned. Obviously, this was not the answer he wanted, "Are there other things you want to do besides playing basketball?"

other?Of course there is, but Ding Lin has a long list of wishes that have not yet been fulfilled, such as traveling around the world, traveling around the world, tasting all the delicious food in the world, and then going to the United States to watch the NBA live.Or just talk about a vigorous and unforgettable love, adding a different and rich touch to his youth.

But when he said the key point, Yang Jingyi promised to oppose it.

Ding Lin was disappointed and felt a little lack of interest, and after thinking about it, it was more practical to choose a spot.

"I want to go to the cinema to watch a movie, go to the video game city to play marbles, and then meet three or five friends, and go to an Internet cafe to have fun..." Halfway through speaking, Ding Lin realized that he had slipped up again, and looked up at Yang Jingyi. Not angry, but rather confused.

"Why are these?"

"It's more realistic and easy to implement."

"Do you like it?"

"I can't say whether I like it or not, but I have never been there and I want to go to those places."

No one would believe it. Having grown up so old and lived in two lives, Ding Lin has never been to places like movie theaters, video game centers or Internet cafes.I used to be busy filming and didn't have time, and I'm a public figure, so I couldn't go to crowded places after all.After passing through, although he was not kidnapped as an artist star, as a senior high school student, he only had school and home, two points and one line.

Thinking about it this way, Ding Lin felt that he was really pitiful.

"Okay, I'll take you out to play this weekend."

Ding Lin: =_=

"What's your expression?" I thought that the brat would be happy if I satisfied his request by saying this, but in the end I gave him such a strange reaction, which made Yang Jingyi unable to figure it out.

"Are you serious?" Ding Lin felt a little unbelievable, Yang Jingyi not only exempted him from making up lessons on weekends, but also offered to take him out to play.It shouldn't be the end of the world in two days. The old fox wants to be the last person for a few days after he has repented?

The author has something to say: writing this chapter, I spent three hours re-watching the online class and reviewing the derivatives. I am tossing someone!