I Just Want To Be a Salted Fish Quietly

Chapter 84

[Absolute Focus] The state after opening is very magical.

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

Absolutely focused skill effects are extremely powerful.

Memory +100%

Learning ability +100%

Perception +50%

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

Of course, this has nothing to do with the knowledge points of freshman and high mathematics not so profound.

High mathematics in the freshman year is actually not difficult, most of the knowledge points are the expansion of high school mathematics.

If your math scores in high school were pretty good, then you don’t need to be too hard in your freshman high maths, and you can pass easily. The class is a little more serious, and it’s not impossible to take the test.

But by the sophomore year, the situation is different.

The difficulty of high numbers has risen a step in vain.

This increase in difficulty is without warning.

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

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

What is this special?

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

Who am i?

where am I?

What am i doing?

Lin Xian reads the book very fast, because many of the knowledge points in the book are learned in high school mathematics, so just a glance, with the blessing of 100% memory, it will be recalled quickly

Time passed by every minute and every second.

On the podium, Dai Pingbo was still explaining the knowledge in the textbook in a simple and profound way.

Wang Zejing was lethargic, Zhang Kai absently looked at the back of the girls in the front row…

Only Lin Xian was reading the book attentively.

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

After discovering that he hadn’t paid attention, he looked carefully.

I have to say that men are the most attractive when they are serious about doing something.

Looking at his profile, Ling Youyu unknowingly indulged in it.

At the very beginning, she saw Lin Xian flipping through the book quickly, thinking he was opening it randomly.

But gradually, Ling Youyu found that something was wrong, because Lin Xian’s expression was extremely focused. This concentration was not deliberately disguised, but inadvertently revealed.

He is really amazing!

Ling Youyu put his cheeks in his hands and couldn’t help but sigh in his heart, but at the same time he was a little bit distressed.

What to do, I like him more and more

Will he like himself

I should like it… He gave his own bracelet today.

Thinking of the bracelet, Ling Youyu’s mouth could not help but slightly lifted, revealing a sweet smile.

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

The sixth edition of TJ is simpler than other editions.

It is simple because some knowledge points have been deleted in this edition, and the content is not as much as other editions.

Basically non-985 or 211 colleges and universities, most colleges and universities will use the sixth edition, unless they are majors in mathematics, they will choose the fifth or even the fourth edition.

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

The pen in Lin Xian’s hand stopped until the last one with an asterisk.

Let A be the mxn matrix and B be the nxm matrix and mn, and prove that det(AB)=0.

“Hey, this question is interesting.”

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

After thinking about it for a while, Lin Xian suddenly heard the teacher say to dismiss the get out of class.

A large class is divided into two sections, each section is 45 minutes, and there will be a 15-minute break in between

Looking at Professor Dai Pingbo, Lin Xian’s eyes lit up and he walked forward with the textbook quickly.

“Mr. Dai, wait a minute.”

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

Looking at Lin Xian, Dai Pingbo laughed and said, “Classmates, do you have any questions? Teacher Dai, I have some questions about this question. Let A be an mxn matrix, B is an nxm matrix, and AB is an mxm matrix. What should I do next? Proof?”

Lin Xian pointed to the question and asked.

Dai Pingbo gazed at the book and looked at the densely packed answers to the problems on it. He couldn’t help being a little surprised.

The handwriting of these answers hasn’t been done yet, obviously just not long after they were written.

Suddenly, Dai Pingbo became interested. He looked at the problem carefully and couldn’t help but smile: “It’s normal that you can’t solve it. This is a typical linear algebra problem. Because of mn, r(AB)sr(A)≤n

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

“understood!”

Lin Xian saw the answer in the book and suddenly realized, thanked: “Thank you Teacher Dai.”

“You’re welcome!”

Dai Pingbo waved his hand and asked with interest: “Have you finished your freshman high maths by yourself?”

“Almost!” Lin Xian said calmly.

Wait!

Finished self-study of freshman high numbers?

The students in the classroom were suddenly full of black question marks.

Damn it, do you want to be so awesome?

And why don’t you go to Qingbei when you are so awesome? Why come to Jincai? Is the FD cafeteria not delicious, or the TJ dormitory beds are too hard? So angry!

“What’s your name, classmate?” Dai Pingbo asked with a smile.

“Lin Xian!

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

“Mr. Dai, I have no idea of ​​changing my major yet. Mathematics is just a hobby.”

Lin Xian politely refused.

Yes, it’s just hobbies.

After just half an hour of solving problems, Lin Xian became very interested in mathematics.

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

Therefore, he decided to incorporate mathematics into his hobbies.

GodTM hobbies!

At this time, Qi Zhenzhen and others looked at him a little differently.

Seeing his refusal, Dai Pingbo was not disappointed either.

In fact, Dai Pingbo himself knows that mathematics itself is an extremely unpopular major, not to mention whether mathematics majors in two colleges such as Jincai can find a job after graduation.

Thinking of this, Dai Pingbo nodded and said, “It’s also good to treat math as a hobby. You can skip my classes this semester. If the final exam is not overdue, if the score is less than 90, then don’t blame me.”

Damn it!

Hearing this, the students in the classroom sighed and looked at Lin Xian with envy and envy.

The professor speaks, and you can skip class in the future, which is too cool!