I Just Want To Be A Salted Fish Quietly

[Absolute focus] The state after it is turned on is very magical.

Lin Xian also enjoyed this state very much, as if swimming in the ocean of mathematics, constantly absorbing knowledge.

Absolutely focused skill effect, extremely powerful.

Memory +100%

Learning ability +100%

+50%

In addition, his own IQ is not low. In this case, the freshman high mathematics textbook in front of him does not have any difficulties at all.

Of course, this also has something to do with the fact that the knowledge points of high mathematics in the freshman year are not so profound.

The advanced mathematics in the freshman period is actually not difficult. Most of the knowledge points are the expansion of high school mathematics.

If your math scores in high school were not bad, then you don’t need to work too hard in the freshman high math, and you can easily pass it. If you take a little more serious in class, it is not impossible to score 80 or 90 in the exam.

But in sophomore year, the situation is different.

The difficulty of high numbers has risen to a higher level in vain.

This increase in difficulty came without warning.

At this time, it is not so easy to pass the exam. As for getting a high score of 04, you need to work as hard as you did in high school.

When they start to learn calculus, most people will be dumbfounded.

What is this?

When I come into contact with linear algebra and complex variable functions, I am afraid that I will doubt life.

who I am?

where am I?

what am i doing

Lin Xian's reading speed is very fast, because many knowledge points in the book are learned in high school mathematics, so just glance at it, and with the blessing of 100% memory, he will quickly recall it.

Time passed by every minute and every second.

On the podium, Dai Pingbo was still explaining the knowledge in the textbook in simple terms.

Wang Zejing was drowsy, Zhang Kai absently looked at the backs of the girls in the front row...

Only Lin Xian read the book intently.

Ling Youyu raised her head for the third time, and secretly glanced at Lin Xian.

After finding that he didn't pay attention, he looked carefully.

I have to say that a man is the most attractive when he is serious about doing something.

Looking at his profile, Ling Youyu was unknowingly addicted to it.

At the very beginning, when she saw Lin Xian flipping through the book quickly, she thought he was flipping through it indiscriminately.

But gradually, Ling Youyu realized that something was wrong, because Lin Xian's expression was extremely focused, this kind of concentration was not deliberately pretended, but revealed inadvertently.

"He's really good!"

Ling Youyu rested her chin in both hands, sighed in her heart, and at the same time felt a little distressed

What should I do, I like him more and more...

Will he like himself?

I should like it... He even gave himself a bracelet today.

Thinking of that bracelet, Ling Youyu couldn't help but raise the corners of his mouth slightly, revealing a sweet smile.

There are some questions at the back of the textbook, Lin Xian has already taken out his pen, and is working hard to solve the questions.

The sixth edition of Gaoshu TJ is simpler than other editions.

The reason why it is simple is that some knowledge points are deleted in this edition, and the content is not as much as other editions.

Basically, it is not a 985 or 211 college. Most colleges and universities will use the sixth edition. Unless they are mathematics majors, they will use the fifth edition or even the fourth edition.

Therefore, the topics in the books are not difficult for him at all.

Until the last question with an asterisk, the pen in Lin Xian's hand could not help but pause.

Let A be an m×n matrix, B be an nxm matrix, and mn, prove that det(AB)=0.

"Hey, this question is a bit interesting."

Lin Xian pondered for a moment, his brain spinning rapidly, and various knowledge points he had learned before kept flashing in his mind.

After thinking for a while, Lin Xian suddenly heard the teacher say that get out of class was over.

A large class is divided into two sub-sections, each 45 minutes, with a 15-minute break in between.

Glancing at Professor Dai Pingbo, Lin Xian's eyes lit up, and he quickly walked forward with his textbook.

"Teacher Dai, the first time."

Dai Pingbo was about to go out with a teacup when he heard a student calling him, so he stopped immediately.

After seeing Lin Xian, Dai Pingbo smiled and said, "Student, is there anything you don't understand?"

"Mr. Dai, I have some doubts about this question. Suppose A is an mxn matrix and B is an nxm matrix, then AB is an mxm matrix. How to prove it next?" Lin Xian asked, pointing to the question.

Dai Pingbo glanced at the book, looking at the densely packed answers to the questions, he couldn't help being a little surprised.

The handwriting of these answers is still dry [obviously, it has just happened not long ago.

For a while, Dai Pingbo became interested, looked at the problem carefully, and couldn't help laughing: "It's normal if you can't solve it, this is a typical linear algebra problem, because of mn, so r(AB)≤r(A)≤n

While talking, Dai Pingbo picked up a pen and wrote down a line of formula.

"understood!"

Looking at the answers in the book, Lin Xian suddenly realized, and thanked: "Thank you, Teacher Dai.

"You're welcome!"

Dai Pingbo waved his hand and asked with great interest, "Have you finished your freshman high mathematics?"

"Almost!" Lin Xian said calmly.

etc!

Self-study freshman high math?

The students in the classroom suddenly had black question marks on their faces.

Fuck, do you want to be so awesome?

And why don't you go to Qingbei if you are so awesome? Why do you want to come to Jincai?

Is it because the cafeteria in FD is not tasty, or is the bed in TJ's dormitory too hard?

So angry!

"What's your name, classmate?" Dai Pingbo asked with a smile. 670 "Lin Xian!"

Dai Pingbo asked: "Student Lin Xian, have you thought about changing your major? I think applied mathematics is very suitable for you!"

"Mr. Dai, I have no intention of changing my major yet. Mathematics is just a hobby." Lin Xian politely refused.

That's right, hobbies.

After solving the problem for just half an hour, Rang Xian developed a very strong interest in mathematics.

Especially after solving a difficult problem, the sense of accomplishment is extremely refreshing.

So, he decided to include mathematics as his hobby.

God TM hobbies!

At this moment, Qi Zhenzhen and the others looked at him differently.

Seeing that he refused, Dai Pingbo was not disappointed either.

In fact, Dai Pingbo himself knows that mathematics is an extremely unpopular major, not to mention that it is difficult to find a job after graduation for a mathematics major in a second-tier college like Jincai.

Thinking of this, Dai Pingbo nodded and said: "It's not bad to treat mathematics as a hobby. You don't have to take any of my classes this semester, but if you score less than 90 in the final exam, don't blame me."

Fuck!

Hearing this, the students in the classroom gasped one after another, and looked at Lin Xian with envy and envy.

If the professor speaks up, he can skip class in a fair and fair manner from now on!

This is too cool!.