Chapter 232

Cheng Nuo lies on the bed and continues to hold the book analytic geometry.

Cheng Nuo's flipping speed is very fast.

He only got the book last night and just read it this afternoon.

It can be said that before this, Cheng Nuo did not know, or even the content of this book.

But in half an hour, Cheng Nuo had finished reading the whole book of analytic geometry.

The contents inside, whether it is plane coordinates and vectors, or all kinds of curves in space, are clear to the chest.

After each chapter of the after-school questions, Cheng Nuo also randomly selected to do a few.

Feeling Just no feeling.

It's just that I don't feel anything, and the title is done.

What else can Cheng Nuo do? He's helpless too, OK. There's no pleasure in challenging the limits at all. After watching it, I fell into the bland.

However, after all, after class questions are only used to consolidate knowledge points of the most basic topics, not much.

Cheng Nuo believes that in the following in-depth study, there will be more interesting and wonderful topics.

Just as Cheng Nuo just put down the textbook of analytic geometry and was ready to get out of bed and ask Yuan Hua to go to the canteen for dinner, the little fat man and McGrady almost went back to the dormitory.

"How are you two? Why are you so late?" Cheng Nuo gets up from the bed, holds the head of the bed, and asks two people with interest.

"Ah The little fat man and T-Mac looked at each other with a long sigh. "It's all tears," he said

In Cheng Nuo's questioning, the two finally told the end of their respective stories.

The little fat man annoyed Chen Mo, who was angry with her angry speech, ran errands and delivered tea in front of the roadshow stalls. At the same time, he gave Chen Mo a family massage on his shoulder.

Ah Wei 18 style, all live do not discount!

Chen Mo instantly satisfied with the massage technique of the little fat man, and immediately decided to put the little fat man into the piano club.

As for the main task, it is to bring tea and water to senior students and give them a full massage. When I'm bored, I have to chat with you.

What, disagree?!

Ha ha ha! Can you disagree with this matter if you say you don't agree?

As a result, the little fat man became a member of Tsinghua piano club.

And McGrady's side, the tragedy is no less than the little fat man.

Inexplicably found their favorite sister, oh, no, is a senior! When the senior student dressed up as the autumn moon Allie was actually a well-known woman's wear boss in the river and lake, McGrady was almost desperate to run.

But In front of a large number of women's wear bigwigs, how can McGrady have a chance to escape.

Under the threat of "Autumn Moon ally" senior in the name of indecency, McGrady signed the membership Treaty of bereavement with tears of humiliation. Forced to join the cosplay Club of Tsinghua University voluntarily, and live under the same roof with a large number of women's wear bigwigs.

…………

“f(x，y)=0，g(x，y)=0。 For such a system of binary higher order equations, if you want to require all the solutions in the complex field, you can first consider f (x, y), G (x, y) as polynomials of X, such that R (F, g) = (...) Cubic meter ^…… Cubic meter ^……） If (x1, Y1) is a solution of the system of equations, then Y1 is a root of R (F, g) Therefore, if we want to solve the system of equations, we must first find all the roots of R (F, g) = 0, and then replace these roots into the system of equations, and then find the value of X

In the advanced generation class, Professor Liao stood on the platform and explained advanced algebra to the public with his unique speed. Today is Friday, which is already this week. It also makes the students of mathematics department suffer a lot.

They had to stay up late to keep up with Professor Liao. That feeling, seems to let people back to the period before the college entrance examination, quite sour.

However, for some difficult knowledge points, they are still in the degree of half knowledge and half solution.

It is not so easy for people in the Department of advanced algebra and mathematics that Professor Liao talked about today.

Let's look at some exercises. Let's try to do them. It's still the old rule. I'll ask my classmates to come up and talk about these problems

The PPT shows three questions.

1. Find the rectangular coordinate equation of the curve composed of x = T ^ 2-T + 1 and y = 2T ^ 2 + T-3.

2. Let a, B satisfy the n-order square matrix over the number field K, X is the unknown quantity x1, X2 The matrix of order n * 1 formed by xn is known to have l, m linearly independent solution vectors for homogeneous linear equations AX = 0 and BX = 0 respectively, where 1 is greater than or equal to 0 and M is greater than or equal to 0.

(1) it is proved that (AB) x = 0 has at least max (L, m) linearly independent solution vectors.

(2) If l + m is greater than N, it is proved that (a + b) x = 0 must have a nonzero solution.(3) If ax=0, and bx=0 have no common non-zero solution vector, and l+m=n. It is proved that any vector α in k^n can be expressed as a = β + γ, where β and γ are the solution vectors of ax=0 and bx=0 respectively.

3. Conclusion form:

…………

Three topics, in the podium of more than 30 mathematics students, difficulty, are not simply.

After all, they just learned this chapter. Although they have done pre class preview, they have tried to do several exercises after class.

But after class, the difficulty of the exercises and the difficulty of these questions given by Professor Liao can be said to be that the witch sees the great witch. It's not at all on a level of difficulty.

Shua Shua!

Still familiar with the scene, Mathematics Department of all are deeply frowned, in the draft paper is very serious calculation.

There was no noise in the classroom except the sound of the pen tip crossing the sand on the paper.

Three questions, Professor Liao gave the mathematics department people 20 minutes to solve the problem.

Twenty minutes later

"That classmate can come up and give us the first question?" Mr. Liao stood on the platform and asked people with a smile.

Shua!

The first one is the simplest of the three.

As soon as Liao Zhixing's voice fell, almost sevenoreight hands were lifted up.

"Well, just this classmate, you come up and give us your solution and ideas. By the way, what's your name? "

"Good teacher, my name is Zhaoyang." Zhao Yang, who sat in the first row, stood up politely and said.

"Then, classmate Zhaoyang, come up and talk about it." Professor Liao made a gesture of invitation, standing on the side of the podium, smiling.

Zhao Yang walked up the platform with his head high.

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