Chapter 62

On the large screen in the conference room, the standard answer to the algebra problem is displayed.

Everyone looked at each other.

That's probably the most standard answer. ”

"Well, although there are other solutions, they are all sideways, and the solution on the screen should be the most conventional and the easiest to think of. ”

"The logic is clear and the steps are simple and straightforward. I don't think there's anything else that needs to be changed. Looks like I can leave work early today. ”

The team leaders were all talking in a low voice, nodding their heads again and again, obviously very satisfied with the standard answer in front of them.

And Gu Lu frowned lightly after reading the "standard answer" to the algebra question at a glance.

"Is this question so complicated?"

Gu Lu wondered in his heart.

The solution given by the standard answer takes nearly 30 lines of formulas.

And when reviewing the topic before, Gu Lu did this question.

Obviously, it only takes a dozen lines of formulas to solve this problem easily.

And the amount of computation required is not as huge as the "standard answer".

Chairman Andre glanced at everyone and spoke, "If there is any other solution to this problem, it can be presented now." ”

As soon as the words fell, Gu Lu felt that Pu Changqu on his side moved the chair.

Then he took an A4 piece of paper, walked up to Chairman Andrei, and said politely, "Chairman, this is another solution to this problem." ”

Chairman Andre nodded and waved to the assistant beside him.

The assistant took the A4 paper from Park Changqu's hand and projected the answers written by Park Changqu on the screen through the projector.

The new solution provided by Park Changqu has a long step.

At a rough glance, there are at least more than 60 lines of formulas.

Coaches from various countries touched their chins and judged their heads at the same time.

"Cut through Muirhead's theorem, but it's a different way!"

"It's a strange idea, but I don't think any of those students can think of using this solution. ”

"The process is fine, the result is right, it's ...... It's too complicated. It's twice as complicated than the standard answer. ”

"No, more than twice as much! Coach Park's solution requires too many calculations, which is not only time-consuming, but also extremely error-prone. ”

"But it's a new solution! After all, Zhuyu is in front, and it's good that Coach Park can do this. ”

For this new solution proposed by Park Changqu, everyone has mixed reviews, but the overall attitude is approved.

Gu Lu also read the solution given by Park Changqu from beginning to end, and the corners of his mouth pulled inadvertently.

Park Changqu's new solution, it is better not to mention it.

It's hard to think of without saying it, it's obscure, the calculations are complicated, and it's easy to make mistakes.

Indeed, through this method, it is indeed possible to calculate the answer to this algebra problem.

As long as the candidate's brain is not convulsive, he will never use this solution proposed by Park Changqu.

Therefore, the solution that Park Changqu said is dispensable.

But the leaders of the national team still give face to Pu Changqu.

Simply expressed his approval of Park Changqu's new solution, and formulated the scoring rules perfunctorily.

Anyway, no one will adopt it, and the attitude of the crowd is very casual.

Even so, Park Changqu is already very satisfied.

This is the first year he has led the Korean team to participate in the IMO, and he showed his big face in front of the team leaders of various countries, showing his personal strength.

Park Changqu felt good about himself and returned to his seat.

When he passed by Gu Lu, he gave Gu Lu a smug look.

"Team Leader Gu, I can't do this solution, right?" Park Changqu sat down and asked with a smile.

"Also...... It's okay. After thinking about it for a while, Gu Lu still didn't tell the truth.

Otherwise, it will be too much of a blow to the self-esteem of this international friend in front of him.

Sure enough, the hero sees the same thing. Receiving the praise of Gu Lu, a former competitor, Park Changqu seemed very happy, "Although six years have passed, I have not fallen behind for a moment in the study of competition questions." ”

Park Changqu began to tell Gu Lu about his hardships in the past six years.

Gu Lu nodded perfunctorily while paying attention to Chairman Andre's movements.

After Park Changqu, there was another demon king from Bulgaria, phew, a team leader from Bulgaria stepped forward to provide another solution to this algebra problem.

It is also a different way to solve it, in terms of complexity, even more so than Park Changqu's solution.

This time it was even more straightforward, because the solution was too biased, it was directly vetoed by the team leaders.

Chairman Andre sat at the main seat of the conference table, crossed his fingers, and looked ahead with a calm gaze, "Do you have any new solutions to this problem? If there is no new solution, then we will move on to the next link and translate these three questions." ”

“...... Wait a minute. ”

A voice rang out.

Pu Changqu suddenly found that Gu Lu, who was sitting next to him, slowly got up.

"Team Leader Gu, what are you doing?" Pu Changqu wondered.

Gu Lu shrugged his shoulders and smiled, "Of course, it's the same as you just now, and you went to provide a new solution in the past!"

Park Changqu: "???"

Gu Lu also has a new solution?

Pu Changqu's expression instantly became serious.

He has always had the idea of competing with Gu Lu.

I thought there was no chance of a head-to-head confrontation this time, but now, the opportunity is in front of me.

As long as Gu Lu shows his new solution, and then compares it with the solution he just provided, it will naturally be clear who will win and who will lose.

Park Changqu is still very confident in his solution just now.

He didn't think that anyone other than the standard answer would write a better solution than his idea.

Park Changqu looked at Gu Lu, who turned around and walked in the direction of Chairman Andre, full of fighting spirit.

However, he soon sensed that something was wrong.

He found that Gu Lu's hands were empty.

So where did he put the solution process of his writing?

Not only Park Changqu, but also many team leaders in the conference room discovered this, including Chairman Andre.

"What about your problem-solving process?" looked at Gu Lu, and Chairman Andre asked with a smile on the corner of his mouth.

Gu Lu pointed to his head, and the corners of his mouth curled, "It's all here." ”

"Do you mind if I use the computer?" Gu Lu said to Chairman Andre's assistant.

"Please. The assistant glanced at Chairman Andre, saw him nodding, and made way for Gu Lu.

Gu Lu leaned down, controlled the computer used to control the display of the conference room screen, and opened a document.

Under the curious gaze of the rest of the team leaders, Gu Lu tapped his hands on the keyboard rapidly.

More than ten seconds later.

More than a dozen lines of formulas floated on the large screen in the conference room.

【...... F(x，y，λ)=f(z，y)+λφ(x，y)

(x0,y0,λ0) is the station point of the function F(x,y,λ).

F(x，y，z，λ)=f(z，y，x)+λφ(x，y，z)=8xyz+λ(x^2/a^2+y^2/b^2+z^2/c^2-1)

Finding the partial derivative of F(x,y,z,λ) yields:

............】

............

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