The love of functions and derivatives

Although from everyone's point of view, derivatives and functions always go hand in hand to solve the 21st question of mathematics in the college entrance examination to make it difficult for the majority of candidates, reducing their hair loss and increasing their sleepiness, but when you think about it carefully, the mathematical definition of function, which is similar to panacea, is used The "Jiu Mao" teacher of the high school calls the knowledge points that are the foundation of high school mathematics, which can be perfectly integrated with any mathematics problem.

So the function indicates that there are many people who know me well, but I am really not familiar with derivatives.

Although the offices of functions and derivatives are relatively far apart, in the 21st century with rapid technological development, this is not a problem, and it can be solved by using QQ to communicate.The person who asked the math questioner for the college entrance examination said: "You guys should get to know each other first on the Internet." Then he sent the qq of the function to the derivative.

Function still remembers the scene of his first online communication with Derivative. It was in the spring afternoon of [-]. The sun was shining on the window lattices. Angled borders.The sunlight and the black casing of the computer merged to create a colorful black.In this way, Function quietly waited for news from the other party while feeling the warm air around him.

About half a minute later, the function receives a friend request: Brilliant Sky requests to add you as a friend, and the verification message: I am the derivative.The avatar is the original avatar with pixel quality that comes with the QQ system. It is a green unknown creature that looks like a frog.

Looking at his flashing vip exclusive avatar pendant, the function said: Derivative, the screen name, this avatar really makes people want to talk and stop talking.

After clicking Agree, the function first sends a "Hello" to the other party.

After about a few minutes, the other party replied: "Hello, are you GG or MM?"

Function looked at this line of words with complicated emotions, his face was a little distorted and even hideous, his fingers trembling slightly, and then four words appeared on the screen, Function looked up as if he was about to die generously, and his pupils dilated slightly when he saw what he typed After hesitating again and again, his eyes suddenly became firm, as if he had decided on something.

The function deletes the line "I am GG" in the input box, and then replies——

"I am male".