Chu Tang: Tell Li Er at the beginning that I am a time traveler

Chapter 47 Are you sure you're not a fairy?

Although everyone here is not short of horses, but the boss gave you a Rolls Royce for nothing.

Then do you want it!
More importantly, this is definitely an opportunity to show your face, what if you do, right?

As a result, after the topic was passed on, the people below were all silent.

Everyone looked at each other, their faces seemed to be written all over, and you said, what the hell is going on here.

Is this something humans can do?

While they were discussing, Li Chong also opened his mouth to attract their attention again: "Cough! Your Majesty, originally, I planned to make something simple, such as chickens and rabbits in the same cage. I only know that chickens and rabbits are in the same cage." However, for questions like this, there are formulas in the calculation books. As long as you are not a fool and memorize the formulas, you can often calculate the answer easily. I think that I should not use such a topic to insult a person who works in the Taishi Bureau And I am a top talent in the Tang Dynasty who is proficient in arithmetic. Therefore, it is a little difficult to solve. In addition, with the knowledge of Yichen, I can only solve this kind of problem, because the problems in ancient books, to be honest, I didn't really look at it. I just flipped through it a few times."

"The main thing is that my family was poor before, so I didn't have that opportunity."

After finishing speaking, Li Zhong turned his head and saluted Li Chunfeng in a friendly manner: "If the questions I asked are really too strange and difficult to calculate, please forgive me. It's all because I didn't study hard."

He said so when he saw Li Chong.

After Li Chunfeng was stunned, of course he also accepted Li Chong's apology.

"Xueshi Li is serious. In fact, I am not good at learning. Li Xueshi can calculate the problems I gave, but I can't do anything about Li Xueshi's problems."

At this moment, Changsun Wuji said, "Speaking of which... Li Chong's answers are all correct?"

Li Chunfeng hasn't looked at it yet.

When Changsun Wuji said this, Li Er looked at him, and someone from Wei Zheng sent Li Chong's answer to Li Chunfeng.

When Li Chunfeng posed the question, he already knew the answer, so he only needed to look at it to know whether Li Chong got the answer right or not.

However, when he got the answer sheet, he was still shocked by the answering process at first glance.

'What are these! ? '

'I don't understand it at all. '

But fortunately, he knows the Jiezi, and besides, he can read and understand the answer in the bottom text.

"Seven coins for a bucket of hemp, four coins for a bucket of wheat..."

All I can say is, absolutely correct.

And the formula question was the same, the calculated answer was exactly the same as what he had in mind.

It was the last question. Li Chong's answer was very speechless, "I have heard of it, but I have no opinion." '

But no matter what, Li Chunfeng still insisted: "Your Majesty, Bachelor Li's answer is absolutely correct."

Inside the Hall of Two Rites.

There was an uproar.

Instead, one person couldn't help asking: "Li Xueshi, why didn't you calculate the answer through calculations?"

The person who spoke was Du Ruhui.

Yes!

Du Ruhui wanted to know very much. After all, even if a smart person like him didn't have to count in his hands, he still had to think about it in his head.

Li Chong said: "This is very simple, just write out the equation."

Fang Xuanling followed suit and said, "What is an equation?"

Li Chong: "Just pretend to know all the numbers you don't know, and then list out a formula."

Li Chong then demonstrated to them how a formula came about.

"Then... when you have these formulas, you can use the algorithm of addition to eliminate all those who pretend to know but don't know."

"This step is repeated several times, and finally an equation with only one unknown can be obtained."

"So... the answer came out."

Everyone looked dumbfounded.

This method, in the ancient books, is not without a name, it is called "Positive and Negative Technique".

The principle is actually the same.

only……

In the past, they could only calculate by placing chips.

If one step is wrong, the whole answer may be wrong.

Crucially, it cannot be checked yet.

But now, Li Chong has written the entire calculation process on paper.

Every step has traces to follow.

even……

It is no exaggeration to say that Li Chong's method can save at least ten times the time compared with calculating chips.

If it is said that Li Chunfeng himself did not bring the answer to the question, then he would have to spend at least half an hour on this question by himself.

After all, this is a linear equation in five variables.

In addition to being shocked, it is still shocking.

Of course, there are still some people who can't keep up.

But it doesn't matter, they should be able to understand the reason, but they are not yet familiar with those symbols.

Li Zhongdao: "This is a list of equations. As long as it is an unknown number, pretend to know it and list the equation relationship. Then according to the relevant rules of the equation, perform calculations, eliminate elements, repeat, and finally get the answer."

Li Chong looked at them, why didn't any of them speak.

Do you think this method is not good?
Right!

This method is too wasteful of paper, and you must know that Datang's paper is also very expensive.

Du Ruhui suddenly sighed, "I didn't expect it to be so calculated!"

Fang Xuanling: "Simply unexpected, haha."

Changsun Wuji refused to accept it: "It's just that there are too many symbols, which make people dazzled."

Li Chunfeng: "Bachelor Li's method is very subtle."

Li Er also felt that this arithmetic is really beyond his ability.His head seemed to be unable to think.

Of course, if he used calculations, he might be even more at a loss.

At least he can understand this before calculating it.

It was possible that in a moment of trance, he forgot where Li Chong had counted.

Li Zhong said again: "Actually, the second question is the same. Pretend to know everything you don't know, and then, according to the principle of Pythagorean shares, just list the equations."

Li Chong perfectly explained that there is nothing that cannot be solved with a series of equations.

Although for the second question, Li Chong did not perform calculations in front of everyone.

However, Li Chunfeng already knew that the answer had already been condensed in those two formulas, and it was only waiting for someone with predestined relationship to unravel it.

Li Chunfeng: "Scholar Li deserves to be a Scholar Li, but the students want to know more, how to solve the problem of Scholar Li?"

Li Chunfeng even started calling himself a 'student'.

Li Chengqian didn't feel much at first, but if the other party really became his teacher's student, then he couldn't accept it.

Just thinking about how to get rid of Li Chunfeng's idea of ​​apprenticeship.

Seeing his teacher, he said again: "Li, what, you are too self-effacing. It is just to communicate with each other, why call yourself a student. My three problems can also be solved by equations, but the first problem may , involves the issue of probability, so you may not get used to it for a while. But as long as I finish explaining what probability is, you should be able to try it out by using the series of equations I just introduced. "

Next, Li Zhong gave an example, what is probability.And use a specific amount to simulate it once for the other party to see.

Only then did Li Chunfeng suddenly realize.

Others also understand what probability is about.

It is the possibility of touching silk socks or brocade socks, and this possibility is ultimately expressed in scores. Of course, it can also be expressed in terms of certainty.

Li Chunfeng mastered the method in an instant, and performed a series of equations for Li Chong and everyone on the spot.

Can't pull it.

This is the mathematician's dedication to mathematics.

"But here are two unknown numbers, how to solve them?"

After the list was finished, Li Chunfeng was in a daze again.

And the whole calculation looks very complicated.

Li Zhong saw that he had listed them all, so he could only say to him: "You can simplify it first to get a quadratic equation in two variables, but in fact, it is a quadratic equation in one variable, because you can use the Substitute the quantity into it, and then just see which one matches the title first.”

Li Zhong quickly calculated the answer for them by using the formula method, and the final answer was: 21.

And substituting the answer into it for checking, it is completely correct.

But the calculation process is more complicated.

So basically most people are fooled.

but!

As long as the answer is correct.

This proves that it can indeed be calculated, but... this question may still be extremely difficult for them.

Seeing the final result, Li Chunfeng took three breaths in a row before recovering.

too frightening.

I couldn't help asking: "Xueshi Li, are you really human? Are you sure you're not a fairy?"

(End of this chapter)