The love of functions and derivatives

If you are a candidate who has experienced the college entrance examination, and your family happens to hold a banquet, then you will be able to experience the wonderfulness of this banquet first-hand. It disappeared, replaced by a scrolling bright red flashing subtitle: "Congratulations to XX student for being admitted to XX University——Congratulations to XX student for being admitted to XX University——"

Of course, before that, your family will go through a fierce battle-filling in volunteers.We all know that parents who don't dictate the wishes of their children are not good parents.In addition, unless you have a score that can be admitted to Peking University and Tsinghua University, there is no parent who does not feel that their child has a score that is not high or low, and it is very difficult to fill in the volunteers.

"It would be great if you got three more points in the test." The parents said.

You think filling out the application is a happy and wonderful thing, but in fact, the whole family may fight over it.

Even the contradictions that are usually piled up under the calm and peaceful atmosphere may erupt all of a sudden.The following dialogue is the personal experience of student C——

"I asked you to get up early in the summer vacation of the third year of high school and you refused. If you worked harder, wouldn't you have these three points? If you have these three points, you will be able to go to ##university! Oh yes, look at the XXX exam With so many points, do you think her points are enough for Nantah University?"

"It doesn't seem to work."

"Then can she go to Wuhan University?"

"It should be possible." Classmate C said with a tangled expression, "...now you are filling out the volunteers for me, not for her."

"I just care about it." Classmate C's mother paused for a second and then said, "Actually, it's good for you to go to Wuhan University. Wuhan University is close to home, and it's convenient to come back, but you don't have enough points."

Classmate C: "...Oh." I want you to say?

"By the way, can XXX enter Nankai University?"

"..."

Anyway, almost chatted.

Classmate C’s mother felt that Classmate C’s exam was not bad. After comparing the grades of the daughters of friends in her WeChat list, although she was a little stimulated, she quickly adjusted her mentality and concentrated on planning the banquet, so she had the following dialogue--

"Mom, I don't think my name should be typed on the big screen. It's embarrassing, and I didn't do well in the exam..." Classmate C said hesitantly.

Classmate C's mother immediately retorted: "Who said you didn't do well in the exam? XX Agricultural College is still a one-book. Your father and I are very satisfied."

"But you see that other people only use that screen after passing the 985211 exam..."

"Okay." Classmate C's mother said something perfunctory absent-mindedly, and then turned to discuss with Classmate C's father what to order for the banquet.