My Identity As A Schoolmaster Has Been Exposed

Chapter 248 Xu Cong Fan Alliance Group (one more)

Yang Kaixuan tentatively said: “Xu Cong, or you should open the group! Change the mode to no prompt, but display it, otherwise you will not bubbling in the group, and many people will add your friends privately.”

Xu Cong thought for a while, what he said also had some truth, so he said to him: “Okay!”

Rather than being joined by these people, it is better to do this, and the province’s self is disturbed every day when he enters q.

So Xu Cong went in and sent a message in the group: “Everyone, don’t add friends, I’m in the group, let’s talk about it in the group!”

When the classmates in the group saw him talking again, they quieted down a bit.

At this time, a classmate suggested: “Xu Cong, let’s talk about the solving skills of Mathematical Olympiad! We can say yes this time, it’s terrible!”

Someone took the lead, and someone immediately agreed: “Yes! But Yang Kaixuan said, if you change the paper, the question will be more difficult!”

“Xu Cong, what questions did you ask this time?”

“Yes, yes, let’s talk about Olympiad! Let’s open our eyes!”

“Understand the ideas you gave to Yang Kaixuan, let us start!”

Those classmates heard the methods Yang Kaixuan explained to them on the way back from the car last time, and they were all shocked.

They have never thought that there is such a simple way to do Mathematical Olympiad questions. With these methods, the speed of doing the questions has increased too fast.

Xu Cong saw that they were so enthusiastic, but he couldn’t respond at once, and looked at Yang Kaixuan, “Uh…”

These students rushed to ask in the group, and there were indeed a lot of questions.

Xu Cong looked through the chat records and picked some key questions, and said to them: “This time the Olympiad Preliminary Questions, multiple-choice questions 3, 7, and 10 are my questions. By the way, I also came up with the final finale.”

When the news was sent, the group was quiet, and everyone stopped the restlessness in their hearts.

Originally Xu Cong was planning to post his questions in the semi-finals and finals, but after thinking about it, only a few people participated in the semi-finals. As for the finals, there were none, so he gave up.

In this way, some people can be beaten less, otherwise, once this kind of news is sent out, most of them will have to be fried.

It was rare for the group to be quiet for a while, and everyone was thinking.

In the end, everyone voted unanimously: “Xu Cong, let’s talk about the puzzle solving skills of Mathematical Olympiad! Kneel for a good method!”

“From now on, learn from the Xu Cong Alliance Group, which is formally established!”

Originally, these people pretended to be standing on top of the pyramid, but unfortunately, their pyramid was built in a well!

Now that there is a chance to go up again, who doesn’t want it?

They are all geniuses, and each one is eager to improve!

Yang Kaixuan saw Xu Cong suddenly looking at himself faintly at this time, and quickly explained to the side: “It’s not me! It’s not me! They are spontaneous! They are not stupid, they have self-knowledge. Compared with you, they know themselves. Where is the gap!”

Xu Cong didn’t tease him anymore, and reluctantly sent a message in the group: “Then just have a chat!”

“But in fact, there is no way, just to learn it! It’s really…”

Xu Cong murmured while typing.

The group of people in the group can’t hear it, but Yang Kaixuan can.

He clung to the phone!

Shivering and cold!

Xu Cong, be yourself!

Xu Cong began to share his experience of doing problems in the group: “Under normal circumstances, problems with a fixed solution method or model are not part of the Mathematical Olympiad.”

“Under the guidance of the general laws of thinking, use the basic knowledge of mathematics to explore, try, choose and combine…”

“What heuristic method, construction method, contradiction method, mathematical induction method, drawer principle, extreme principle, tolerance and exclusion principle”

“The skills of Mathematical Olympiad can be regarded as the extension of mathematical skills and the creation of new skills. You still have this thinking!”

“On top of that, upgrade…”

“For example, given that x, y, z are positive numbers and xyz(x+y+z)=1, find the minimum value of the expression (x+y)(y+z).”

“Obviously 2, it uses the principle of construction.”

“This kind of basic form is based on the known conditions as the raw material, and takes the conclusion as the direction to construct a new mathematical form, so that the problem is simple and easy to solve in this situation!”

“Commonly, construct graphs, equations, functions, counterexamples, etc.”

“Another example.”

“The first and second teams will each have 7 players to participate in the game in a pre-arranged order. The two teams will first play with the first player, the loser will be eliminated, and the winner will then play with the losing player No. 2 until one of the players is eliminated. , Seeking all the possibilities of the game process.”

“There are many similar questions like this, I believe you can find them easily.”

“This is the RMI principle. Let R denote the relational structure, or system, of a set of preimages, which contains the preimage x to be determined, and let M denote a kind of…

“Take, logarithmic calculation, change yuan, introduce coordinate axis, construct generator function, design mathematical model…

“Forget it! That’s it! This thing can’t be said all night~~.”

“Sleepy! I’m going to sleep.”

Xu Cong typed very fast, a long paragraph in a while!

The group owner also gave Xu Cong a manager, and everyone was mute, only the group manager could speak.

After Xu Cong is over, unlock the silence.

When Xu Cong finished talking about his sleepiness, he put down his phone and fell asleep.

But when the group saw the experiences he shared, they exploded.

….…

The next morning, Lin Mengjiao sent a message to ask Xu Cong to get up. After lying in bed for a few minutes, he picked up the phone and looked at it.

“Fan group? Xu Cong fan alliance? What the hell? When did I have this group?”

With puzzlement, Xu Cong clicked in and took a look. This is not the same group from last night!

When did it become my fan base?

Just about to ask Yang Kaixuan, but after looking around, there is no one in the dormitory now.

“Hey…the last one again!”

Xu Cong got up, stretched, and went to wash slowly. When he arrived at the class, Lin Mengjiao prepared breakfast.

Xu Cong asked Yang Kaixuan while eating, “What’s the situation, what’s going on in the group?”

Yang Kaixuan knew what he was asking, and reluctantly said to him: “After you slept, many people resonated with what you said!”

“You also know that there are some things that can only be understood but not expressed, but after you have said them, they still use examples to express them, which makes them even more admired.”

“So with the vote of everyone in the group, our group becomes what it is now.”

Xu Cong was eating. He was a little speechless when he heard these things. He even swallowed as one meal: “Uh…”

“Oh, by the way, weren’t you boring before? I want to find some questions to pass the time. I mentioned this to them. I think that from time to time, some amazing questions will come to you.”

As soon as Yang Kaixuan said this, there was news in the group.