After Explosive Sniper and Old Attack[E-sports]

How big is Han Yizheng's psychological shadow now...

Now I am not only called by Erguotou to the podium to write a question that I don't even know, but there is also the "wolf-like tiger" gaze of the teaching director who cannot be ignored.

It's like a glow on the back, which makes people feel a chill in the back.

Han Yizheng swallowed, and couldn't help shaking his fingers holding the chalk. When he saw the topic on the blackboard, he suddenly became dizzy.

The topic is:

It is known that f(x) is an increasing function defined on (0,+∞), and f(x/y)=f(x)-f(y)

Question: (1) Find the value of f(1)

(2)假若f(6)=1,解出不等式f(x+3)-f(1/x)＜2

This question is a compulsory abstract function question, and he didn't listen to it too much in class, so when he encountered it, he looked confused and didn't know what to write with chalk.

As the minutes passed, the discussion below gradually grew louder. Han Yizheng turned around secretly and met Erguotou's piercing eyes.

He dodged the opponent's gaze for a moment.

Erguotou's name is Zhang Wei, and he looked at him with a frown: "What are you doing in a daze? Hurry up and write! Don't you usually have to force yourself? How can such a question be difficult for you, a little overlord?"

Han Yizheng pulled out a wry smile: "How can there be, Mr. Zhang, I don't know how to do this question."

"It's right if you don't know it." Zhang Wei immediately raised the big triangle board in his hand, pointed to the question and said, "This kind of question is not difficult. You just need to spend some time and practice more, and you won't know it." I didn’t say that, how many times have I said this type of question, what is in your head? It’s bean curd, right, the final exam will definitely be taken, if I return this question to the wrong person in the future , Copy all the final exam papers twice."

After listening to these words, the whole class was so quiet that you could even hear a needle drop on the ground, and Erguotou was still talking non-stop. Even without a loudspeaker, the voice was enough to break through the entire classroom, it was so loud, It was so loud.

And Han Yizheng stood awkwardly on the stage, enjoying the "hot" eyes of the whole class and the dean.

"The pile of papers I usually send to you, remember to do it yourself, don't always give me other reasons, saying that I assign a lot of homework, I am not for your own good. These questions are all written by me. I sorted out the questions together, basically all the questions for you, not for you to get good grades in the future test. If you finish all the five sets of papers I sent out yesterday, is it still like this? I think you are just lazy , I'm too lazy to do this, I don't have a good decoration in my head, I just pretend to be useless..."

At this time, a beautiful female school bully raised her right hand, her eyes were calm.

"What's the matter with Mu Lian?" Seeing this scene, Zhang Wei temporarily stopped his long speech and asked.

Mu Lian supported the middle frame of the glasses with her middle finger, and calmly spit out a series of words.

"Teacher, let me solve this problem."

"Uh...you'll understand." He paused and said.

“首先由定义域知x＞0，那么就可以得到f（x/y)=f(x)-f(y),我们再令y=1可以推出f(x)=f(x)-f(1),又因为f(x)在（0,+∞）上的增函数,所以f(1)=0，又f(1/x)=f(1)-f(x)=-f(x)，原不等式f(x+3)-f(1/x)<2可化为f(x+3)+f(x)<2，可推出f(x+3)-1<1-f(x)，即f(x+3)-f(6)，那么f(x+3/6）＜f（6/x），则0＜(x+3）/6＜6/x，我们解得0＜x＜（3根号17-3）/2。”（题目来源网络）

When she said this, she was very calm, and her thoughts were clear, and there was basically no lag. As soon as her voice fell, the whole class burst into applause.

Han Yizheng was also stunned, and then he showed his white teeth and smiled at Mu Lian, with gratitude in his eyes.

Seeing this, Mu Lian smiled back on her calm face, her ears were slightly red, she lowered her head, like a girl who sympathized with Dou Chukai.

And Zhang Wei was obviously very satisfied, and said loudly: "Student Mu Lian's words are flawless and worthy of praise, and you should learn more from her. Alright, Mu Lian, you sit down, Han Yizheng, you go down and sit down first, remember Listen to the class carefully, and don’t let me fly the plane in class.”

"Okay." Han Yizheng said he was very happy and wonderful. He quickly put down the phone and ran back to his place. His movements were not procrastinated. Before he left, he even glanced at the old pedantic dean.

"I'll give you this question again..."

Erguotou continued to explain the question again like a normal person, not caring about the dean's gaze at all.It is worthy of being an old/jianghu for many years, this class style is solid...

Zhang Wei is recognized as a good teacher, but like a Tang monk, most people are unwilling to listen, but there is no way. For those who want to take the college entrance examination, there is no other way for the time being.

After sitting down, Han Yizheng took a deep breath, patted his heart, and said to himself: It seems that the old man, the dean, didn't recognize me. It's so dangerous, and I have to thank Mu Lian after class, otherwise this class will be Erguotou It's so easy to let me go.

Tucao to Tucao...

But the class is still there.

Han Yizheng felt that the water was in dire straits, but Yanzhi's side was fine, and he couldn't sense Han Yizheng's inner activities at all.

It's getting late now, and the phone is out of battery. The matter here has been discussed, so Yan Zhi should really go back, otherwise it will be difficult to explain.

The sky gradually began to pull down, and scattered stars flickered over the city. It may be because the lights in Shanghai are too dazzling, reflected in the sky, and there is a hazy beauty of looking at flowers in the fog.

After the two came out of Dihuang, Yu Yao drove Yanzhi back home. The two slender figures cast a long shadow, and they overlapped under the staggered lights, giving off an ambiguous meaning like tulle. .

"During this time, you can go to the ladder first and check the rankings. I have something to do at the moment and I can't come to you. Remember to practice your gun well and see you next month." Yu Yao was a head taller than him, with a small smile on his lips.

Yanzhi nodded, fingers tangled by his side, looked into his beautiful eyes and said, "Thank you."

At first glance, this sentence sounds a little too emotional, and even hypocritical, but for him, this sentence has to be said.

A person will meet many people of all kinds in his life, and there will often be one person who will change his life. This is also an arrangement of fate, a predestined fate.

"Thank you, you don't need to talk to me about this." He raised his eyebrows slightly, his eyes gentle.

Unexpectedly, Yu Yao rubbed his hair with his hands afterwards, put one hand in his trouser pocket, leaned over his body and whispered in his ear: "I'll wait for you."

These words lingered in his ears, and there was a magnetic sex appeal that made people feel a little itchy in their hearts. Yan Zhi only felt that his ears still had the breath of the other party, and they were very hot.

But the real acquaintance is only a few dozen hours, but... But why do people want to get close...

Yan Shi felt that his heart was a little confused for a moment, he subconsciously touched his nose, and hummed.

Afterwards, the two said goodbye. There is definitely no need to go to school today. Even if they go, there will be no good fruit to eat. Thinking of the words Yu Yao said to him just before getting in the car, he only felt his heart beating very fast. chaos.

He said: "Don't be so easily shy when you see me in the future, or I'm afraid I can't help but want to..."

Shocked by this sentence, Yan Shi hurriedly waved his hands and ran into the building.

He kept convincing himself in his heart: Maybe what Yu Shen said was that he couldn't control himself and wanted to hit me. If I saw myself so shy before, I would definitely not be able to help hitting myself. Well, it must be so!

There were only one or two people in the elevator. He pressed the elevator on the eighth floor of his house, and when the elevator door was about to close, a voice came.

"Stop, Yanzhi!" Only a slightly panting voice was heard in the seemingly empty hall.

He looked up.

It was Han Yizheng who came. His forehead was a little sweaty. His face was flushed due to strenuous exercise. Of course, it is also possible... from anger.

"Why are you here?" Yan Zhi was puzzled, and pressed the button to open the elevator door.

But what he didn't expect was that Han Yizheng immediately locked Yanzhi's throat with his strong arm as soon as he rushed in.

"See if I don't clean you up today, I'll read my name upside down!"

Yan Zhi was immediately immobilized by his action, and immediately clasped the opponent's waist with one hand: "You kid is brave enough to ride a horse, don't you? How dare you lock my throat?!"

The other party immediately laughed three times: "I will not only lock your throat today, but also strangle your neck!"

During this process, three more two women and one man in overalls walked in. When they saw such a scene, they were obviously frightened and thought they were going to fight.

After seeing that the two were just joking, the three decided to come in.

There are some office workers next to them, and their eyes have been on them since they came in.

"Brother, you have to have something to say, let me go first, so many people don't look good." Yan Zhi decided to beg for mercy first, he wanted face.

However, Han Yizheng was still holding back his anger, and it would be uncomfortable if he didn't let it out.

"Listen to me before I finish. Why don't you answer the phone call today? Answer truthfully and be strict with any resistance."

Yan Zhi immediately replied, "My phone is turned off."

"Of course I know your phone is turned off."

Yan Zhi: "..." Then you still ask me why I didn't answer... Is this person a fool?

"What I want to ask is where did you go after that?"

Han Yizheng was obviously very clueless about words and could not grasp the point of the question, so he had to ask it again.