The love of functions and derivatives

More than ten years ago, He Jun killed the derivative several times to no avail. He suddenly thought that since the derivative was written by the textbook writing team, wouldn’t it be possible to destroy the function if he could get the ink from the writing team?

Jun He managed to obtain the ink through some means, but when he wanted to enter the world of high school mathematics textbooks again, the previous methods did not work.Because in order to maintain the stability of the high school mathematics textbook field, the conditions for entering the mathematics field have to be changed every ten years, and He Jun happened to be at that time, so there was that sentence.

The ink left by He Jun on the bookshelf has been kept until today, and it was discovered by He Jie.

"I didn't lie to you, the mathematical definition will not die, what you killed is my derivative, but 'the writer can create another derivative, even if he and I can't be exactly the same, he and I have different ideas , but he can completely take over my job and continue to maintain the operation of mathematics problems related to the derivatives of high school mathematics textbooks."

A strong sense of powerlessness struck, especially after Derivative had finished speaking for a long time. Derivative felt that his physical strength was a bit overdrawn. Derivative resisted the dizziness and sneered at He Jie: "You are so pathetic. I know you hate you." Father, but you lived like him."

"No, I'm so likely to be the same as that pedantic, strict and fierce person." He Jie felt as if he had heard a big joke, "There is still half a bottle of ink left, and when I come next time, I must inject the function as well." .”

It's a pity that in the next second, He Jie's smile froze on his face——

"But aren't you doing something as vicious and inhuman as He Jun?"

"You are the second Mr. He." The guide said, "But in some respects you are not even as good as him. At least Mr. He's math ability is much better than yours. He is a lunatic who is good at mathematics, but you are just a lunatic. "

Derivative's words hit He Jie's sore spot, many fragments, ridicule and mocking voices rushed out of his mind, almost drowning He Jie, and let him go back to that disgusting high school.

——"Isn't your father a math teacher? Why are you so bad at math?"

——"I heard that your father got 140 in mathematics in the college entrance examination. How is he so good? Why did you only get such a small score in mathematics?"

——"You are so stupid, are you born to your father? Are you not half as smart as your father?"

The above is just an appetizer for He Jie, and what impressed He Jie the most is this sentence——

"You don't know such a simple question? You are not like me at all."

Why did he explain that he was born with the title of the son of He Jun, a famous high school teacher, so that everyone took it for granted that he did well in the exam, and if he failed in the exam, it seemed like he had made a huge mistake, but, he really I'm working hard on math.

One night, when the ten o'clock bell rang for the first time, the desk lamp radiated hot light, illuminating the derivative problem in front of him. He Jie dropped the pen in his hand in an atmosphere, and said at the same time: " I want to transform the world of mathematics!"

As soon as he finished speaking, his body became transparent, and a mechanical girl said to him: "Welcome to the world of high school mathematics textbooks. If you want to return to the human world, please choose death."

It was purely an accident that he came to the world of mathematics, but after he came back for the first time, he read He Jun's diary and understood the true meaning of what He Jun said in the diary to eliminate derivatives. Originally, I wanted to add the proof of the derivative formula in the high school mathematics textbook, and then I tried to kill the derivative many times but failed. Later, He Jie remembered Lao Wang's famous saying that function is the foundation of high school mathematics.He Jie suddenly had an evil idea. If functions were eliminated, wouldn't high school mathematics be much easier?

The answer is yes.

So there is a back story.

"Then you have to ask him, he only cares about his own reputation, he only cares about how many students from prestigious schools he can bring out, he can spare time to tutor his classmates, but he never put his heart into teaching me! "He Jie withdrew his confused soul from his memory, and shouted at the derivative, "Don't I want to learn mathematics well?"

"This is how you learn mathematics well?" The derivative sneered, "You are just pitying yourself."

A siren sounded in the distance, and it was the police. He Jie's expression changed, and he skillfully stabbed himself in the chest with a knife.