Jiang is still old and spicy, and Zheng Lao immediately followed Lan Chengying with Yu Xiang's army.

Lan Chengying, Yu Xiang: "....", they looked at each other, help, they don't know.

Zheng Lao waited silently for Lan Chengying and Yu Xiang's answers, and the other students present were waiting for their answers.

These advanced mathematical methods, not to mention the students of the mathematics department present, are Chen Hao, the proud disciples of Zheng Lao, who are very knowledgeable in a wide range of studies on weekdays, and only know the first one or two methods, and he has heard of the latter ones, but he has only heard of them.

If you explain it in detail, you can't explain it without your own thorough understanding.

Embarrassed....

Zheng Lao asked sarcastically: "I don't know, I thought you raised this question because you also had some in-depth understanding of it." ”

"I didn't expect it to be so basic, I couldn't answer it. ”

Being stimulated, Yu Xiang said without thinking: "My sister Su must know." ”

"Sister Su, it can't be Su Li, right?"

Zheng Lao said lightly: "As far as I know, her mathematics score in the college entrance examination is only twenty-eight points. ”

The meaning of the unfinished words is self-evident.

Elder Zheng naturally dislikes students like Su Li, not to mention the influence of Elder Qin and Director Xie.

In the past, Director Xie once slapped the report cards of Su Li and Lan Chengying on the table, and complained to them angrily.

Based on the achievements of these people, they still want to enter BGI, which is the reputation of BGI for a hundred years, and it is also an insult to their teachers.

It's just that the principal insisted on going his own way at that time, and they also thought that they were not placed in their own department anyway, so they did not speak against it.

The classmates burst into laughter, twenty-eight points.... Even if it's a mess, it won't be just such a small score.

Except for Lan Chengying and Yu Xiang at the scene, only Chen Hao did not show a mocking smile.

He was a little abrupt, this score definitely didn't want to be something that someone who could come up with more than 30 solutions to a difficult problem could do.

Is it true, as his roommate said, that they directly took someone else's work?

These second ancestors have money in their hands, and there are always one or two people who bend their waists for five buckets of rice.

At this time, Lan Chengying's mobile phone rang, and when he saw the name, his hand was faster than his brain, and he subconsciously pressed the green connect button.

Su Li's voice came out of the earpiece, "Where are you?"

"Hey, are you looking at this question?" Lan Chengying's mobile phone camera direction happened to be facing the projector, and the content on the screen happened to be taken into Su Li's eyes.

She had just woken up, and she was in a daze, and she didn't notice the unusual scene around her for a while.

The next second, I heard Su Li say: "This question is not interesting, it is very simple, and the answer is that his conjecture is correct." ”

Originally, there was still some noisy sound, but at this moment it was extremely quiet.

Su Li's small yawn sound was clearly transmitted from his hand to the ears of others.

"Since it's that simple, how did you prove it?"

"Ah, this still needs to be proven? Su Li said lazily, she hadn't even noticed that the person who spoke out just now was not Lan Chengying's voice.

Zheng Lao's heart was put down again. It's ridiculous for the faint hope I just had.

It is ridiculous that a man who has scored only twenty-eight points in mathematics should believe the truth of her words in a moment.

"Eh, I forgot that your IQ is not very high, and you can't know the result at a glance. Su Li's unintentional words sarcastically ridiculed everyone present.

At this time, Lan Chengying, who had reacted, was proud, looked around demonstratively, his chest was straight, and said to Su Li: "Then you tell me, I am also a person who is very eager for knowledge." ”

The onlookers students: "...."They looked at Lan Chengying one by one and were extremely speechless.

What kind of courage makes you think that what Su Li said is true?

I don't know what he's proud of.

If Su Li can prove it, they will eat Xiang live....

Anyone who studies mathematics has heard of the difficulty of Goldbach's conjecture.

The Norwegian mathematician Brown proved theorem 9+9, the German Redmacher proved 7+7, and then 6+6....3+3 and so on were conquered one by one.

Then there is only one step left before the final result is 1+1.

However, in order to achieve this final step, it has gone through an extremely long process of exploration, but no one can give the final proof.

Some mathematicians once suggested that perhaps if you want to prove 1+1, you must create new mathematical methods to solve the problem, and the previous road has not worked.

Even those great mathematicians can't do anything, how can it be solved by a little sister who doesn't learn and doesn't know how to do it.

Just when someone couldn't help but want to be sarcastic, Su Li's voice came out of the mobile phone again.

Originally, Su Li was too lazy to move her mouth, but Lan Chengying's words moved her slightly.

Once upon a time, I don't know in which worlds, her yearning for knowledge was also hungry.

"Well, this proof problem can be solved by substituting a simple formula. ”

"Wait a minute, I'll write it down, take a picture and send it to you. ”

Then, the sound of brushstrokes sounded, and then Lan Chengying's mobile phone beeped: You received a new text message.

"I'll come back and bring the vegetarian food of Zhaiweifang back, hang up. ”

After the phone was hung up, everyone stared at Lan Chengying in anticipation.... Mobile phone in hand.

Although I felt that these people were pretending to be suspicious, my heart was still like being scratched by a cat's paws, and I itched so much that I couldn't wait to snatch the phone over and see what Su Li had sent.

And Zheng Lao was vigorous, took the lead, his face tightened, and when Lan Chengying didn't react, he directly snatched the mobile phone into his hand.

"Eh, what are you doing...."Facing an old man in his sixties and seventies, Lan Chengying really couldn't do anything else, so he could only watch his beloved mobile phone being held in his hand by others.

Don't look at Zheng Laoyi's age, he plays with his mobile phone more than young people.

quickly turned out the picture sent by Su Li, which should be said to be a draft.

First of all, what catches the eye is the freehand font like a flying dragon and a beast.

Zheng Lao secretly said "good word"

The ancients said that words are like people, and people who can write such a font have their own hills and valleys in their hearts.

Zheng Lao couldn't help but think that maybe they had misunderstood her.

The thought flashed through him, and his mind was all about the content of the draft, and he quickly discarded these unnecessary distractions.

He slowly read it word by word, and slowly, the expression on his face changed: his eyes were slightly open, the corners of his mouth were pursed, his face was flushed, and his breath was short.

Zheng Lao suddenly shouted, "Give me paper and pen." ”

That's right here, and it's right here.

The inference is also correct.

In this draft picture, a new formula is used, and Zheng Lao has used many methods, but he has not found any flaws in this formula, and what is shown in front of him is an impeccable new equation. That is, this equation is correct ....

In this way, the correctness of Goldbach's conjecture can be quickly proved.