There are always students who want to tease me

"The function z=f(x,y), then f(x,y) is differentiable at the point (x,y). A. There is a continuous partial derivative at the point (x,y). B. At the point (x , y) is bounded C in a certain field, and continuous at point (x, y), which question should you choose?" Yan Hao took the exercise booklet and scanned around, and finally clicked on a question and patted it on Yu Zexuan In front of his eyes, he read it word by word.

"Ah...Choose C." Yu Zexuan grabbed his hair, shook his head and looked at it for a while before reluctantly giving an answer.

"Take a closer look!"

Obviously the answer given by Yu Zexuan was wrong.

"B?" Yu Zexuan answered weakly again.

"A!" Yan Hao slapped the table hard, and continued, "The next step, let f(x)=2^x+3^x-2, then when x→0 () A, f(X ) and X are equivalent infinitesimal quantities. B, f(X) are infinitesimal quantities lower than X. C, f(X) are infinitesimal quantities higher than X. D, f(X) and X are of the same order Non-equivalent infinitesimal quantities. Tell me, what should I choose for this question?"

"Hmm... choose C?"

"Choose D." Yan Hao's face darkened again, and he squeezed out two words from between his teeth.

"Ah yes, choose D!" Yu Zexuan repeatedly echoed, turning his head and showing a hypocritical smile at Yan Hao.

"Then look at this question, assuming f(x, y) has a directional derivative along any direction at point (x0, y0), then f(x, y) at point (x0, y0): A: continuous, but Not necessarily differentiable B: continuous, and differentiable C: not necessarily continuous D: A, B, and C are not correct, tell me, what should you choose?" Yan Hao stretched out his slender white fingers, and leaned over to the other side of the book. After clicking twice on the question, the other hand pressed Yu Zexuan's head, forcing his gaze to fall on the question.

Yu Zexuan complained endlessly in his heart, but he had no way to resist. In the end, he could only honestly look at the question while biting the tip of his pen. After careful thinking, he said, "Choose C for this question!"

"Choose C, choose C, choose C, you fucking know to choose C! Can you be more serious for me!" Yan Hao copied the exercise booklet on the table, and slashed at Yu Zexuan's head, Slap him every time you pause.

Yu Zexuan stretched his neck and hugged his head to avoid, begging: "Hey, I was wrong, I was wrong, I am serious, I am serious, so what do you choose for this question!"

"I'm really unnecessary to teach you here!" Yan Hao stopped angrily, unfolded the exercise booklet in front of his eyes, looked at the question, and then twitched his mouth in embarrassment: "This question... really choose C."

"Let me just say, I really read it carefully, but you still don't believe me." Yu Zexuan breathed a sigh of relief. He had been reviewed here by Yan Hao for several days, but it didn't seem to have any effect. The reason is because he has been absent-minded.

Yan Hao was also a little depressed. Seeing Yu Zexuan's innocent expression, he sighed faintly. In fact, Yu Zexuan was more than just absent-minded. He couldn't settle down at all. Between the three of them, and even between the four of them, there was an indescribable delicate relationship.

"Forget it, let's stop here in the morning, and we'll have dinner later." Yan Hao put down the exercise book and sat down on the bed, pinching the space between his eyes a little tiredly.

Yu Zexuan sighed with some self-reproach, got up and sat next to Yan Hao, and pinched his shoulders for him. He was dragged from the bed by Yan Hao early in the morning, but this morning also had little effect , The second exam will start tomorrow, and he knows that he may really have no way to pass it.

Yan Hao has been urging him every day since the beginning and end of reviewing, and taking him to self-study, but he was either catching up on sleep in the library self-study room, or peeking at the side faces of people around him, which led to failing so many subjects in the end, and now it's time When it was time for the second exam, his mind was so muddled that he couldn't concentrate at all, wasting Yan Hao's time and energy in vain. A person like him probably wants to become a social elite, a pillar of the country, and can do it every minute and every second. With so much knowledge in his mind, why bother wasting his life on him, a good-for-nothing.

Besides, Yan Hao is already a junior this year. He remembers that Yan Hao said that he is going to take the postgraduate entrance examination and wants to go abroad to study as a graduate student. So it is time to start preparing now, and the effort must be doubled. The time required And energy is not as easy as it sounds.

But he is different from Yan Hao, even if he fails the exam, his father will definitely not watch him and be punished like this, so he is confident in this point, and every day is not just dawdling, but taking pictures , painting, and animation to earn some extra money, so that I can live a more comfortable life. As for studying, I don't care at all.

The most important thing is that Yan Hao doesn't know this at all, always reprimanding him, and always worrying about his future. For Zexuan, unconsciousness is frightening. He has no way to explain it to Yan Hao. Don't even dare to tell him the truth.

In fact, he regretted it a little now. He didn't want to be downgraded. He also had to go abroad for his five-year education. He could choose any country. When Yan Hao decided to go, he would follow him. Wouldn't it be nice?

"Don't be angry, I'll learn, I'll definitely learn, and I won't be demoted." Yan Hao's labor was fruitless, and Yu Zexuan could only compensate him by being courteous.

Yan Hao turned his head and gave him a blank look, then slapped off the hands that were pressing on his shoulders and said, "Do you care, don't just mess with me here! I have been teaching you for so many days, and you can't even answer the simplest questions." I can't answer it, the high school students I tutored during the holidays all learn faster than you."

"Then they should be fast. High school is the pinnacle of life. I haven't used it for a long time. It's rusted. I can't learn it. Besides, high school mathematics is a subject, and advanced mathematics is a subject. Magic!" Yu Zexuan made Yan Hao happy.

"I have passed the university entrance examination, how can I not learn this little thing? Are you stupid or stupid? I just don't care, so stop sophistry!" Yan Hao refused to listen, acting like a patriarch.

If some teacher's parents had said such things to Yu Zexuan, he would have walked away without saying a word, but every time Yan Hao talked about him, he would listen obediently, and he would go in and talk about it if he didn't listen, but he never Impatience means that Yan Hao cares about him, worries about him, and is willing to take care of him, which is what he wished for, but after learning that Yan Hao has a girlfriend, he doesn't know how to face it. Not willing to let down Yan Hao's good intentions.

"It's not a sophistry, every day, I really don't like to learn these things, not everyone has to take the road of studying hard and making progress every day."

It is rare for Yu Zexuan to have a serious heart-to-heart talk with Yan Hao. There are some things he has never told anyone, but he really wants to tell Yan Hao.

"It's okay if you don't want to study. It's normal not to like these rigid textbooks, but you always have to pass the exam. If you continue like this, you will fail? Degrade? Drop out? Your Chinese-Western cooperative college, your parents spend it for nothing There are tens of thousands of tuition fees for you, you can’t just sit around and wait to die.”

"It's not just waiting to die, I know I'm useless to you, but I still know a lot of other things, any one can't make me live, I know I'm sorry for you, you fucked me up I'm worried, but I still look like this." Yu Zexuan gripped the bed sheet, his voice became smaller and smaller, and he lowered his head in grievance.

"So? You still don't plan to study hard, continue to fail subjects, and then spend two years in school, and then go abroad for another two years. In the end, you don't even have a degree certificate, and you will live on your craftsmanship in the future? Then you go to college? What's the point? Why don't you just go home now!"

Yan Hao's hair is about to stand on end, he can't wait to spit Mo Xingzi on Zexuan's face, he also doesn't understand why he likes this guy, he liked Zhao Jiayan before, because Zhao Jiayan is the same person as him , is the kind of excellence he recognizes, but the Yu Zexuan in front of him cannot be said to be excellent, but he is a completely different kind of person. In Yan Hao's meticulous life, he is not good at all. Follow the routine.

"I... Anyway, this school is a must, and my family doesn't allow me to drop out of school." Yu Zexuan had no choice but to insist on his image of a playboy.

Just like his father insisted that he study finance or business management, and want him to inherit the family business in the future, Yan Hao is also forcing him to do things he doesn't like, but he just can't get angry with Yan Hao, even if he is forced, he He also has a hundred willingness in his heart. He doesn't like studying, but he likes Yan Hao.

"You... Forget it, then tell me what you want to do in the future. I can't let you hang around with me every day without doing anything. I'm really used to you." Yan Hao chose to compromise. He didn't have as much time as following him to attend his class. He also wanted Yu Zexuan to stay by his side for a while, so he always said it was annoying, but it wasn't true. Strongly refused.

"Then I will take on a more stable job this year. Do you remember the animation I made last year? It was based on the story of your article. Didn't you support me in doing this? Now a company has contacted me to set up a small animation. The animation working group, the salary is good, I will not follow you every day."

Last year, he just made a few short animations because of his hobbies. He didn’t expect that the reverse would be really good after putting them on the Internet. Since then, companies have been wanting to subsidize him to make commercial animations. Because he doesn’t want to be restrained and too busy, he wants to be with Yan Hao wanted to spend more time with each other, so he refused all of them.

But now that Yan Hao has a girlfriend, he is also embarrassed to hang out with others all day long. What he said earlier was foreshadowing, but now is the point. Do what he wants to do, he likes Yan Hao, he must be worthy of others, on the other hand, he also has to look at the situation, maybe Yan Hao will find that he will not be used to it without him pestering him, falling in love is not getting married , it is still possible to break up, maybe, he will have a chance!

"Oh, good," Yan Hao was not happy when he heard this, and nodded indifferently, "Then I don't care about you, you like to review or not."

He is happy for Yu Zexuan to find something he likes, but it is not awkward, everyone has to move forward, Yu Zexuan has no reason to be his little follower forever, he is getting more and more busy with his studies, There is no time to fool around with Yu Zexuan all day long.

"No, no, boss, of course I have to rely on the boss for my studies. I promise to the organization that as long as the boss is willing to take time out of his busy schedule to teach me, I will never slip away again, okay? !"

Yu Zexuan suddenly smiled and hugged Yan Hao fiercely from behind and fell back. Yan Hao also let go of the knot in his heart and fought with him. The two of them just covered up their own concerns in this joking way. In order to say these words, Sora decided to start slowly estranged from each other.