The love of functions and derivatives

As we all know, candidates for the college entrance examination - on the [-]th and [-]th of each year, are a kind of precious family-level protected animals.In these two days, their treatment will be significantly improved, and their food will have a qualitative leap. In addition to the material improvement, in the spiritual aspect-they will enjoy the supreme care and greetings from their parents.

Because we all know that the two days of the college entrance examination have a particularly good temper.

Classmate C looked frustrated.

She didn't expect that the basic inequality matryoshka could not be used as an optional question. She didn't expect that the finale of this year was probability. She analyzed the curve to the step of the function expression, but found that she could not find the maximum value of the triangle area... Wait... It seems that she forgot to discuss the fact that the slope does not exist!

She almost cried: "I... failed the exam."

Classmate C’s mother was wearing a bright red cheongsam, and the smile on her face froze when she heard the words, she turned and looked at her father who was wearing a navy blue cheongsam reproachfully: “Look, I told you to wear a red cheongsam too, why don’t you wear a red cheongsam? If you don’t believe me, my daughter failed the exam.” Then she turned to comfort her daughter: “It’s okay, I’ll get back my score if I take the exam well.”

Student C let out a sob from his throat when he heard the words: "It's good if I don't get a score in the comprehensive science..."

I saw classmate C's father said with a complex and distorted expression: "I see, I will definitely wear green tomorrow."

Classmate C, Classmate C’s mother, and Classmate C’s father went home together.

However, what is unexpected and reasonable is that tomorrow's Li Zong will also be difficult.

Candidates were miserable and burst into tears. They silently tore off the post-it notes that said "I want to take Tsinghua University" that they had pasted on their desks, and began to inquire about schools with good re-study results and the re-study fees. In Gao's materials and test paper handouts, he found the "45 sets of golden examination papers", "the required papers for the college entrance examination", "the same volume of Hengzhong", "the real test express" and so on that he planned to sell as waste paper.

As the saying goes, "the emperor takes turns to do it, and this year comes to my house", in the world of high school mathematics textbooks, this is another scene——

At this moment, probability is raising its proud head and chin, and walking proudly in the aisle of the office, a pair of leather shoes are slapping on the floor.