Xueba chat group

Chapter 29 Beauty You Did Wrong
After all the candidates got the test papers, they read the questions first.After one pass, many people gasped!
"The first question of today's final is even more difficult than yesterday's last question. It is indeed the final."

"This difficulty is comparable to the question type of the National Mathematical Olympiad!"

"It's so difficult, I don't have a clue."

Many people couldn't help whispering.

Xiao Jun also looked at the first question of the test paper, frowning.

(1) Suppose P(x) is an integer coefficient polynomial with exponent d greater than 0, and n is the number of different integer roots of P(X)=1 or -1, then there are n greater than or equal to d + 2.
"Hiss... so difficult! It feels like I have no idea how to start." Xiao Jun searched all the mathematics knowledge he had learned, and found that he didn't know how to solve the problem at all, and he had no idea at all.Also, the five days of Olympiad knowledge learned a few days ago is completely useless.

Xiao Jun glanced at Yang Qianqian next to him, and found that she was also frowning slightly, and couldn't write in her hands.

Ten minutes passed quickly like this.

Yang Qianqian still has no idea, because the first question is very difficult!

She looked at Xiao Jun next to him, and saw that he was acting like a fool and didn't take this exam to heart at all.She didn't even bother to ask the other party such stupid questions as if she had any ideas for solving the problem.

Anyway, in her heart, it was useless to ask.Yesterday's topic was easier than today's, and Xiao Jun had no idea, but today's topic is more difficult, so he must have no idea.

"I can only rely on myself to get rid of distracting thoughts." Yang Qianqian withdrew her gaze, took a deep breath and calmed down her scorched mood.

At this time, Xiao Jun, who had nothing to do, also glanced left and right, and he found that all the contestants were currently engrossed in thinking, and none of them had written.

It seems that the topic of the final this time really made all the contestants feel the pressure.

"Enter the Xueba chat group."

Xiao Jun took pictures of all three questions and put them in the chat group.

Xiao Jun: @All members, veterans, come out to work.I want perfect marks for these three questions!
Sheldon was the first to jump out, and this guy is usually very idle.

Sheldon: Group leader, is today another Mathematical Olympiad problem?Huh~ These three Olympiad questions are quite difficult.To get a perfect answer, I need about an hour or so.

Olympiad questions often have multiple ways to solve them, and it is generally very difficult to get a full score answer.Even in the International Mathematical Olympiad, there are very few people who can get a perfect score.If you have a problem-solving idea and can do it, it's not bad.Because this way also has points to take.

Comet Takishima: A perfect answer?OK, I'm going to do it now!
Sheldon: Hey, let's see who can do it faster!
Comet Takishima: ...

After exiting the interface of Xueba Group, Xiao Jun saw that no one was writing, and everyone was still thinking hard.Quite a few people almost bit the tip of the pen!

It proves that this first question stumps many people.

Time is passing quietly.

Suddenly, many people felt that the 4.5-hour exam was too short.Because now an hour has passed unknowingly.

Finally, Xiao Jun saw that a group of contestants had finally started to write.

"It turned out to be Jiangbei High School, so awesome? You found the solution to the problem in an hour?" Xiao Jun frowned.I secretly thought in my heart that it deserves to be one of the top [-] high schools in the country, there are really a lot of talents in it.

When he looked away, he was surprised to find that Yang Qianqian also started to write.

"So awesome?" Xiao Jun was a little surprised.

But in the next second, he was hit by Aite in the Xueba chat group.

"Enter the Xueba chat group" said silently in his heart, and the interface of the Xueba chat group appeared in front of him.

Sheldon: Group leader, we have written the answers to these three questions.This time I worked with Comet Takishima, which is definitely the perfect answer!
Comet Takishima was very speechless when he saw this, since you couldn’t write a perfect answer within an hour, why don’t you invite me to study it together?

Xiao Jun: A perfect answer?
Comet Takishima: Right.

Xiao Jun: Haha, you guys are amazing, thank you.

After reading the answers, he memorized them all in an instant. This is the ability of photographic memory.

When he quit the Xueba chat group, he saw that Yang Qianqian next to him had almost finished writing the answer to the first question.

"Huh~ I feel that this way of solving the problem is wrong? And the proofs of each step are too far-fetched, and the answer after the proof is obviously wrong." After taking a look, Xiao Jun compared himself from Takino Hui Hui and the others found that Yang Qianqian seemed to have made a mistake.

brush brush...

"Huh~ I finally finished the first question." Yang Qianqian finally finished writing all the answers to the first question, and breathed a sigh of relief.

"Beauty, it seems that you did the first question wrong!" At this time, Xiao Jun said to Yang Qianqian indifferently.

"En? What's wrong?" Yang Qianqian frowned.He gave Xiao Jun a cold look.I thought to myself, how do you, a soy saucer, know that I did something wrong?Do you know how to do this Olympiad problem?She also almost exhausted all the brain cells to come up with this idea of ​​solving the problem.You casually say you did something wrong?

"It's all wrong!" Xiao Jun grinned.

Xiao Jun's words made Yang Qianqian even more upset, and said with a hint of sarcasm in his tone: "Since you said I was wrong, would you be able to do this question?"

"I have my own ideas for solving the problem, but I don't know if the answer is right or not. How about I write it down for you to have a look?" Xiao Jun smiled slightly, showing a mouthful of white and neat teeth.

"Write it, let me take a look." Yang Qianqian looked at Xiao Jun in surprise. He also has an idea to solve the problem?

After three or five minutes, Xiao Jun wrote the answer on the draft paper.

"Hey, let's see how it goes."

Yang Qianqian took the answer and read it carefully. At first, she looked at it casually. She felt that Xiao Jun's answer must be scribbled.

But after she watched it for a minute, a hint of surprise appeared on her face.

After 2 minutes, her face was full of shock!
Five minutes later, she showed an expression of admiration all over her body.

"You... this problem-solving idea is really perfect. I have never seen such a unique and perfect problem-solving method. Also, your proof is very correct, and the answer is also very correct...I, I am indeed You did it wrong." Yang Qianqian raised her head, looked at Xiao Jun in shock and said.Originally, she had some confidence in her answer to the first question.But after reading Xiao Jun's answer, she realized that she really did something wrong.If you don't say anything about the answer, the idea of ​​​​solving the problem from the beginning is wrong.

(End of this chapter)