The love of functions and derivatives

Shu Lie felt a little unbalanced, the leather shoes of probability outside the office aisle creaked the floor, Yuan didn't know what kind of joke he said, shaking out the basic inequality of probability and others, laughing like a goose, Shu Lian's scalp was quarreled Feeling numb, he thought to himself: Why are all these people following the trend?

"Hey!" Arrangement couldn't help sighing, he angrily threw away the lollipop that he ate with only a paper stick left, and said with some envy and envy: "The so-called feng shui turns around." .You don’t know, the probability will be great this time, and the outside world has changed. Everyone is going to curry favor with him.”

Derivative turned a deaf ear, poured water by the pool with a watering can, looked at the leaves of Chlorophytum, as if he didn't hear what Arrangement was saying, and when Arrangement couldn't help but want to repeat it, he finally replied: "It's normal , human nature."

After hearing the words, Shu Lie was silent for a while, and after a long time, Derivative had watered every potted flower slowly, and when he was about to start pruning the branches and leaves of Chlorophytum, he suddenly acted like he had realized everything, and said with emotion ,"yes--"

"Everyone is filthy and I am alone! In this filthy and troubled world, only I am willing to be the lotus flower that emerges from the mud without being stained!"

Derivative looked at Shu Lie with the eyes of a mentally retarded person, and continued to trim the branches and leaves of Chlorophytum.

"This world is too vulgar, this world is too dirty, and this man's heart is not ancient!" Shu Lie touched his left chest with his right hand.

Derivative: It's not that serious.

Sequence is still immersed in its own one-man show, shouting loudly. Fortunately, the sound insulation effect of the second luxurious office is good, and outsiders can't hear it clearly: "Even if the basic inequality and linear programming extend a helping hand to probability, even if the circle is to please the probability Flattering and fawning jokes that he didn't want to tell, even though Function forgot his old friends and threw himself into the embrace of probability—"

The derivative's hand holding the scissors stopped suddenly, and a spider plant leaf that was growing well and had no disease spots was cut off by the derivative.

He frowned unobtrusively, and mercilessly interrupted Shu Lie's moaning: "When?"

It took two seconds for the sequence to calm down his full and full emotions, and he asked doubtfully, "When and when?"

"Banquet."

"Aren't you going?"

The derivative put down the scissors in his hand, turned around, and looked at the sequence blankly: "I changed my mind."

"Oh." Shu Lie felt that the derivative was a bit capricious, but he didn't think too much about it, and replied, "At [-] o'clock tomorrow night, the XX Hotel on Hongxing Road."