Xueba starts with change

Chapter 43 Cannot be used directly for problem solving
When he woke up from this sleep, Chen Zhou had a feeling of being separated from the world.

“Really good sleep”

Chen Zhou stretched on the bed, then reached out and touched the head of the bed.

He reached for his phone and picked it up to have a look.

"Fuck! It's over."

The phone shows 10:45.

Chen Zhou hurriedly jumped out of bed and quickly put on his clothes.

My heart was wailing endlessly, and I slept well, but Old Wang's side was probably going to explode.

"Hey, Chen Zhou, are you awake?"

Hearing this voice, Chen Zhou subconsciously shrank back.

Looking at the door again, this old-fashioned man, who he least wanted to see, was standing at the door.

Then, with a bowl in hand, noodles? !
"Mr. Wang Wang, why are you here? Hurry up and take a seat."

As Chen Zhou said, he pulled out his clothes, pulled out the bench, and invited Wang Xuehui into the room.

"Are you okay? I see that you didn't go to class this morning, and you didn't ask for leave." Wang Xuehui put the noodles in his hand on the table, approached Chen Zhou, and asked with concern.

"I'm sorry, teacher, I overslept, I didn't know how to do it yesterday."

This was the first time that Chen Zhou overslept in the history of going to school for more than ten years. He had never had it before, so that Chen Zhou stuttered even when explaining.

However, what Chen Zhou didn't expect was that Wang Xuehui interrupted him with a smile: "Did you study too late last night? And the night before yesterday, did you learn that it's almost dawn?"

Chen Zhou was stunned and said slowly, "Teacher, how do you know?"

"You don't need to ask me how I know, you can't do this in the future, you know? The body is the capital of learning. Although we emphasize hard work, people are not made of iron. You don't sleep all night, and you are so tired during the day. Intensive study, and you didn't sleep at noon yesterday, how can you bear it!" Wang Xuehui looked at Chen Zhou, and said, "Go wash your face and eat this bowl of noodles. Forget about today, you can make up for it later Give me a review. If you are late again in the future, I will ask you to do a review in front of the whole class."

Chen Zhou looked at Wang Xuehui, a little uncertain, is this old Wang serious?Such an understatement, with extra care?
Is it true that there is a good or bad academic performance?
Seeing that Chen Zhou was not moving, Wang Xuehui urged, "Come on, you'll get a piece of it when your face gets cold."

"Hey, okay, thank you teacher." Chen Zhou came back to his senses, nodded yes, walked out of the room quickly, brushed his teeth and washed his face.

Sitting in front of Chen Zhou's desk, Wang Xuehui couldn't help frowning as he looked at the scattered review materials.

Looking at the whole room again, there is almost no empty space, and there are piles of draft paper and old materials.

"Study is very hard, but can't this room and this table be cleaned up?" Wang Xuehui couldn't stand it anymore, and helped Chen Zhou organize the materials on the table.

When Chen Zhou returned to the room, he saw that Wang Xuehui had put the review materials on the table neatly in small piles of sub-subjects.

And Wang Xuehui was watching intently with a piece of scratch paper.

Chen Zhou thought for a while, then approached silently, and followed Wang Xuehui's gaze.

On this scratch paper are his notes on Lagrange's mean-value theorem and some application examples.

Luckily it wasn't some messy notes
I took another look at the backpack, it was intact and had not been opened.The unfinished papers and handouts should also be safe.

"Cough cough." Chen Zhou coughed twice, before knowingly asked: "Teacher, what are you looking at?"

Seeing Chen Zhou coming back, Wang Xuehui pushed the bowl of noodles and said, "Eat the noodles first."

Chen Zhou obediently picked up the bowl and ate.

Wang Xuehui focused his eyes on the draft paper again, and after reading all of it, he said, "Chen Zhou, when did you learn this?"

Chen Zhou thought about it and replied, "I just learned it recently."

Wang Xuehui asked again: "Are you all self-taught?"

"Well." Chen Zhou nodded.

Wang Xuehui wondered: "You don't usually have access to this knowledge. How did you remember to learn it?"

"Uh, to make it easier to understand the problem, I searched on Baisou, and this theorem appeared. Out of curiosity, I clicked in and looked at it. It was quite interesting, so I learned it." Chen Zhou Reluctantly, he explained the reason for his eagerness to learn.

"How does it feel to learn?"

"It's very good. It's useful when solving some function problems."

Talking about this, Wang Xuehui nodded very gratified. For such a studious student, besides studying, what else could make him late?
Objectively speaking, Wang Xuehui was right.

After a pause, Wang Xuehui thought of something and said to Chen Zhou, "What if the teacher told you that this theorem cannot be used directly in the college entrance examination?"

"No way? Why can't I use it directly? What will happen if I use it?" Chen Zhou's face was full of doubts and he was stunned. Such a useful theorem, the theorem that I learned only after I cultivated and exploded my liver, you told me that it can't be directly use?
Wang Xuehui explained: "Because this is the knowledge of advanced mathematics, which does not belong to the category of high school mathematics. However, high school mathematics cultivates basic mathematical literacy. It pays attention to all mathematical thinking and the standardization of each problem-solving step. "

"Like Lagrange's median value theorem, not to mention how many students know it, even if everyone knows it, they all remember it. What can be remembered is only the theorem itself. It is almost impossible to understand the ins and outs of this theorem. Understood. In this case, using it directly when solving the problem is just opportunistic. Moreover, if you make a mistake, it is even more likely that you will not get 1 point."

"However, then again, I really understand the ins and outs of this theorem, know the proof method, and don't care if I use it directly, right?"

After Wang Xuehui's remarks, Chen Zhou didn't react for a long time, so that the sandwiched noodles hung in the air.

It's all about angles.

When Chen Zhou was learning Lagrange's median value theorem, what he thought of was how to use it directly and how to solve problems more easily.

But ignore the fact of taking the college entrance examination.

The college entrance examination can be said to be an investigation of 12 years of basic education. If you use advanced mathematics knowledge beyond the outline, it may make solving problems easier, but just like Wang Xuehui said, in case of writing mistakes, what do you use to score?

The reason is also very simple.

Using basic knowledge to answer the questions step by step, you can see the results of your learning over the years.

But if you use the superclass knowledge and directly substitute it into the theorem, you can't see anything.

Not to mention, even the substitutions are wrong.

Chen Zhou understood from Wang Xuehui's perspective.

But when he thought that this was the hidden task of the system, and he would never be allowed to learn a theorem that could not be used, Chen Zhou only felt tired.

If I contact Wang Xuehui again, it turns out that the cultivation of immortality is just the beginning, and the big fish of Lagrange's mean value theorem has just surfaced a little.

Chen Zhou sighed silently in his heart, finished pulling the noodles, and said to Wang Xuehui: "Mr. Wang, I understand. Thank you, I will use this theorem carefully. Also, do you take this bowl with you?"

"Bowl, why should I take it away, give it to your landlord."

"landlord?"

"He's my brother."

"???"

(End of this chapter)