The love of functions and derivatives

"The exam time is up, please stop answering the paper—"

The five o'clock bell rang at the same time as the bell for the end of the exam, which meant that the last subject of the college entrance examination-English was also over.This year's English is a bit strange, because for the first time, the candidates no longer need to help Li Hua write essays. I know in my heart——

It has ended.

A long, long runway has finally come to an end.

At the moment when the paper is handed in, the score has actually become an unchangeable past tense. Some people will scream in surprise that they got a six-point comprehensive multiple-choice question correctly, while some will regret that they did not check when they checked. It's time to revise the answers on the answer sheet.

But this is all in the past, don't worry too much, life still has to look forward, doesn't it?

The iron gate formed by the parallelogram was slowly closed, and the students who came out looked for the shadows of their parents in the crowd.The private cars responsible for taking the children home were parked at the gate of the test center. There were quilts and a thick stack of books with handwriting in the trunk of those private cars. Together with the crowd, they blocked a road.

But not long after, the flow of people moved slowly and spread out towards the direction of the three intersections, and the remaining sporadic private cars were also driven away. A day ago, no, it could even be said that it was bustling an hour ago At this time, there is no one in the place.

A big show will eventually come to an end.

The female students let go of the bangs that were clipped because of repeated discipline by the class teacher and meet at the barber shop to have their hair permed. The boys meet together to pick up the basketball that they haven’t played for a year because there is no physical education class. Go shopping, watch movies, in short, life is colorful. Colorful and fun.

A crescent moon hangs high in the sky, shining on the lit windows of every house on the ground.

"Ah, today's moon is neither curved nor round!" The function pulled up the curtains of the bedroom, shifted its sight from the outdoor moon to the indoor, and said to the derivative, "On this special night, should we do something special?" What about the matter?"

Derivative started to use social networking tools gradually after learning about He Jun's death, coupled with the influence of the surfer's function, and Derivative is a person who asks questions when he doesn't understand.One day, when he was studying on a certain website, he saw 'man's third leg' being posted on the barrage. He was puzzled and asked Function, and Function grinned: "You will know tonight."

Derivative has recently become obsessed with imitating the domineering president. After all, in Derivative's eyes, the domineering president is a very avant-garde and trendy image, so Derivative heard what the function said, and said: "Man, you are playing with fire."

Function chuckled, Derivative was sitting on the edge of the bed, he straddled Derivative's lap, his restless right hand hooked Derivative's tie, this time Derivative's tie was given by him, Derivative is very precious Wear this tie every day.Function restlessly unbuttoned his shirt with his left hand, smiled and said, "I guess your next sentence is 'man, don't challenge my bottom line'."

"It's too old-fashioned." The function pecked lightly on the lips of the derivative, "Can I change it?"

Derivative thought for a while and said, "Then... is the night beautiful tonight?"

The function immediately followed up with the words of the derivative without mercy: "The wind is also gentle?"

"Tut tsk tsk." Function shook his head, and finally gave up the idea of ​​hearing a nice love word from the derivative, "Forget it, forget it, let me do it instead."

"A high school math teacher once said to his students: How many times have I said this? How many times? There are infinitely many derivative functions corresponding to the original function! Do you need + C to find an indefinite integral?!" The function pushed the derivative down, "Do you know what this sentence means?"

"What do you mean?" Derivative's breathing became a little heavy, and his warm snort sprayed on Function's ear, causing a circle of thin powder to startle.

"It means that there are tens of thousands of derivative functions, and the derivative of the function has only one answer." Looking at the derivative, the function said very earnestly and piously, "You are my only one."

As soon as the function's voice fell, he was crushed under the body by the derivative.

The next morning, Function stared at the red mark on his wrist, then glanced at the crumpled tie thrown on the bed, and sighed: Why didn't I know that the tie had this effect?

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