I am the cook, but I am Li Er's son-in-law

Wei Zheng scolded himself in his heart, Rao has a good relationship with Yin Xuan, but this kind of behavior is really reckless.

Knowledge is always the most precious thing.

Not to mention this kind of...obviously, it is not common knowledge.

According to the previous words.

This knowledge should be higher than that of Datang's current mathematics.

But it was also for this reason that Wei Zheng couldn't restrain his curiosity - not only him, even Li Yuan, who was only interested in seeking pleasure when he was old, also became interested in this knowledge.

And there are not many readers in restaurants now.

Their eyes widened, and their eyes were full of burning desire.

"Look." Wei Zheng took it very important, but Yin Xuan didn't care at all, he waved his hand and said casually, "What's the matter, so nervous."

"Books won't eat the melon seeds of your empty little head."

Wei Zheng stared.

It's a good thing, why...it's so unpleasant to spit it out from Yin Xuan's mouth.

This damn mouth.

But... under the eaves, Wei Zheng lowered his head skillfully, and turned the book. Just the first page made him dizzy.

vector…

I don't quite understand it.

Wei Zheng's eyelids twitched slightly, but his complexion didn't change. The old fox's self-cultivation is probably one of the best people in the world.

He slowly turned back several pages, and finally reached a new chapter.

Wei Zheng breathed a sigh of relief, but... soon the breath came back, blocking his trachea.

Derivative.

Oh... If the vector is still within the scope of his barely comprehensible, and he can understand the most basic definition, then this thing is so real that he can't understand it at all.

There are words in heaven.

Wei Zheng's hands trembled a little, are these really out of the scope of counting?

Can't read it, but he couldn't lose face, Wei Zheng closed the book and nodded heavily: "A good book, indeed a good book."

"Miss Hui, you have to study hard. This is an opportunity that ordinary people can't find."

He speaks earnestly, honestly and honestly.

Yin Xuan didn't give him face, raised his eyebrows, and asked: "Understood?"

Wei Zheng's face froze.

"Tsk." Yin Xuan smacked his lips.

Wei Zheng became a little annoyed: "I haven't learned arithmetic much, so I can't understand these things, isn't it a normal thing?"

Yin Xuan didn't speak, just clicked his tongue again.

Wei Zheng gritted his teeth.

This kid is so annoying!
A scholar from the side came over and said cheekily: "Mr. Zhengyang, I can, can I take a look."

Yin Xuan nodded.

The man happily took it from Wei Zheng's hand. As soon as he turned the first page, he fell into deep thought, but soon his brows relaxed.

Wow, I turned to the chapter of Chapter 2 derivatives.

Wei Zheng glanced at it, and it was similar to his appearance just now. He had malicious intentions and asked, "Understood?"

A "tsk" was contained in the closed mouth.

"Well, vector." The scholar nodded, "The concept has been mentioned in the magazine, and it has been summarized in our society."

"But it's not as clear as in Zhengyanggong's book."

Wei Zheng couldn't get out this "tsk", which made him a little aggrieved. He tapped the table lightly and asked again, "Do you also understand the next chapter?"

The scholar nodded again: "Yes."

"Calculus, the society is studying this aspect."

Wei Zheng was stunned for a moment, not too confident: "Isn't this thing called a derivative?"

"Derivative is a basic knowledge in differentiation." The scholar explained casually, "It is also a very important concept."

Wei Zheng nodded, was dazed for a while, and said "Oh."

It’s over.

Not only can't read, but also can't understand.

The knowledge in these textbooks is what this scholar knows. From time to time, some papers on mathematics will be published in magazines. In Tongfu Society, mathematics and physics are the most researched, followed by chemistry, classics and meanings. kind of stuff.

They really care about math.

The textbooks prepared by Yin Xuan for Li Hui are actually all researched by the students of Tongfu Academy.

The concepts and skills of calculus are proposed every once in a while, or there are some new breakthroughs.

certainly…

They are now also in a dilemma. Although calculus is easy to use, the foundation is not so clear, and the logic seems a bit confusing.

The several mathematicians in the society often quarreled and even fought because of these things.

Paradoxes, even fallacies, emerge in endlessly.

They have consulted Yin Xuan.

But Yin Xuan didn't reply to them, just said that there is a solution, but they need to walk the road by themselves.

This also led to.

Many mathematicians in the society have published many papers in magazines, and Wu Sui even invited them personally if they are qualified.

But they are not willing, a huge problem exists on them, if this problem is not solved, they dare not, and are ashamed to go to Fengchao to work.

Yin Xuan has scolded them for their brains.

But they are so stubborn to die.

perhaps…

Everyone who is obsessed with the way of mathematics is like this. They love money, fame and wealth, but they love knowledge more.

This scholar is one of them.

He knows all this knowledge, but he takes it very seriously. Yin Xuan collects knowledge according to the system, and this rigorous and closed logical loop makes their knowledge system grow from weeds , felt the impact of a vast gust of wind.

I flipped through a few pages.

The scholar reluctantly put down the book in his hand, looked at Li Hui, then at Yin Xuan: "Mr. Zhengyang, this husband... oh, it will take some time for this girl to learn this knowledge."

"I'll borrow these books first, and I'll return them to you after they're transcribed?"

Li Hui stared blankly at the scholar.

What had she caught in this man's eyes just now?
A flash of light.

Pious, hot, powerful and full of light.

Is this... pursuit?

She looked down at the book in her hand, and suddenly had a different feeling.

Yin Xuan smiled slightly, and said softly, "I'll put these books here. If you want to read them, just come and get them yourself. Just don't damage the books."

The scholar's face brightened.

Yin Xuan sighed again, and then said: "You guys are all doing well, just don't be so restrained, and ask any questions you need."

"Why are you always thinking about those identities?"

"What's the use of this male and that male?"

"You just put these books in front of them, can they understand these books with their public status?"

Wei Zheng narrowed his eyes and looked at Yin Xuan in surprise.

Damn, he scolded himself obliquely again.

This bastard!

……

It is estimated that there are still 20 words left and the book will be the finale!After the total number of words is 200 million, it will be finished. At that time, the new book will start sailing, and the new book will be released at the finale.