Omnipotent Data

Chapter 287

[Known a^==a15xa25x^2a35x^3a45x^4a55

=a15xa25x^2a35-x^3m45x^4a55, find the coefficient of -x^3 in f? 】

For this calculation problem, Cheng Nuo set the point to break the problem on the side-addition method.

Construct a fifth-order nonsingular matrix based on the conditions given in the title, and then use the edge addition method to easily solve it.

It's just that Professor Liao doesn't seem to mention the knowledge point of adding side sub-methods in class.

Forget it, let them derive this theorem by themselves, it shouldn't be difficult.

Thinking this way, Cheng Nuo made a final decision.

There are three big questions left.

The problem of binary generation of polynomial rings, the problem of separating roots of polynomials, and the equivalence of ladder-shaped linear equations.

Cheng Nuo came up with three questions based on these three key points.

After checking it again, Cheng Nuo did not find any errors.

Cheng Nuo let out a sigh of relief, and clipped the seven questions he asked to the test paper.

At this point, his work has been completed. And it takes time, just one morning.

Cheng Nuo didn't delay, and after lunch, he came to Professor Liao's office.

"Teacher, I have finished writing the question!" Cheng Nuo handed the final draft of the printed test paper to Professor Liao.

Professor Liao seemed to be busy with other things. After receiving the test paper handed over by Nuo, he only glanced at it roughly before handing it back to Cheng Nuo again. "Run for me, send this test paper to the Office of Educational Science and Technology, and ask them to make 125 copies for the advanced examinations of the Mathematics Academy."

"No problem, Professor, then I will go first?"

"Well, go ahead."

…………

Cheng Nuo returned to the dormitory after his busy schedule.

Only McGrady was in the dorm alone. Seeing Cheng Nuo coming back, McGrady couldn't help but curiously asked, "Cheng Nuo, what did you do just now? I just heard a classmate say that I saw you come out at the entrance of the Educational Science Office?"

Cheng Nuo shrugged, "It's hard to say a word! You will know what happened in half a month."

McGrady: "Oh."

…………

The final exam is approaching.

Cheng Nuocai remembered that he also served as a member of the study committee of the Finance Department.

Under the supervision of class leader Yan, Cheng Nuo organized the classmates to start evening self-study work.

Although when it comes to college, self-consciousness is the most important thing, but if someone urges a little bit by the side, the motivation to study will increase a lot.

Since there is only their class in the freshman finance department this year, there is no comparison in terms of performance.

Therefore, the goal of learning committee Cheng Nuo is to ensure that there will be no students who fail to show up in their class this semester.

But having said that, in the first semester of their finance department's freshman courses, in addition to the high number, the remaining few courses are hardly missed even if they only start to review one week before the exam.

Compared to some majors that "as long as you choose a good major, you will win the college entrance examination at the end of the year", the students in their finance department are quite happy in the first two academic years compared to more than a dozen subjects.

With the passage of time, the entire Tsinghua campus has gradually been enveloped by the atmosphere of the final exam.

The library seats are rarely full.

The students on the road are also in a hurry, or take a book directly on the school bench to review.

The solemn atmosphere is no less than the last few days before the college entrance examination.

In the 16th week of the fall semester, almost all colleges have closed classes.

The painful exam week has finally begun!

On January 15th, Cheng Nuo's first subject opened.

College English is a subject that Cheng Nuo thinks he can easily handle.

With several items including the radio, card pen, ID card and so on, Cheng Nuo strode into the examination room. Confident and fearless!

His first university exam will begin here.

Goal, special scholarship! come on! !

Cheng Nuo is in very good condition. As soon as he encounters an exam, Cheng Nuo can secrete a large amount of adrenal hormones, like a chicken blood.

Forty-five minutes later...

Less than 30 seconds after listening on the radio, everyone in the examination room saw a figure take off the earphones, stood up from the seat, packed up the test papers, walked to the front desk, and handed the answer sheet and answer sheet A female invigilator.

"Teacher, I have finished writing."

Cheng Nuo's voice was not loud, but in the silent examination room, his voice was extremely clear.

In the examination room, a person looked at Cheng Nuo at the podium in disbelief.

That guy... this degree is really strong!

However, they were not disrupted by Cheng Nuo's supernatural hand. The final exam is based on the results of the examination papers.

Some big-time academics, obviously have the ability to hand in paper half an hour earlier, but in order to achieve higher scores, they try to be stable. After all, ~www.readwn.com~ At their level, one is divided into two points. That is the gap between scholarship and no scholarship.

But Cheng Nuo doesn't matter. Even if he was allowed to check there for more than an hour, nothing could be found wrong. Because... there is nothing wrong with his test paper!

For Cheng Nuo, a man who pursues degree in everything, uh... of course, except for that! For him, saving a little time is a little bit.

University is great! Exams can be handed in in advance. It’s like a high school, I’m bored to sit for more than an hour after I’m done.

…………

Two days later, Cheng Nuo ushered in his advanced mathematics exam.

He applied for exemption from Professor Lu, so since then, Nuo has almost never been to the advanced mathematics course. Cheng Nuo has no knowledge about examination knowledge and exercises. But this does not affect his determination to get full marks.

One is for the special scholarship, and the other is for Cheng Nuo to continue to prepare for the exemption application for advanced math courses next semester. If the high mathematics score this time is not enough, then he has no face to ask Professor Lu to sign.

Cheng Nuo scanned the questions from beginning to end the first time he got the advanced math test papers.

Simple difficulty, okay!

The difficulty of the question is basically within Cheng Nuo's expected range.

Cheng Nuo pulled off his pen cap and started to do the questions, first filling in the blanks with ten.

…………

Huh huh!

The topics are very simple, and it is even simpler for Cheng Nuo, who has already taken courses in mathematics.

The only thing that is slightly more difficult is the last big question.

There is a continuous reciprocal on, f=f=o, and…………】

The idea of ​​solving the problem is to prove that f is actually a Γ function through the infinite anomalous integral of f in the interval, and then use the residual formula of the Γ function to solve it.

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