Chapter 284 (1/2)
Chapter 287
[known a ^ (- 1) = (25 , f (x) = A15 + xa25 + x ^ 2a35 + x ^ 3a45 + x ^ 4a55
= A15 + xa25 + x ^ 2a35-x ^ 3m45 + x ^ 4a55? 】
in this calculation problem, Cheng Nuo's breakthrough point is in the method of bordering.
A fifth order nonsingular matrix is constructed according to the conditions given in the title, and then it can be easily solved by using the bordered subformula method.
It's just that Professor Liao didn't mention it in class.
Well, let them deduce this theorem by themselves. It should not be difficult.
In this way, Cheng Nuo made a decision.
There are three big questions left.
The problem of binary generation of polynomial ring, the problem of polynomial interval root, and the equivalent problem of ladder linear equations.
According to these three key points, Cheng Nuo put forward three questions.
After checking, Cheng Nuo didn't find any mistakes.
Cheng Nuo took a breath and put his seven questions in the paper.
So far, his work has been completed. It takes only one morning.
Without delay, Cheng came to Professor Liao's office after lunch.
”Teacher, I have finished the problem!” Cheng Nuo handed the printed final paper to Professor Liao.
Professor Liao seems to be busy with other things. He just glanced at the papers from Nuo and handed them back to Cheng Nuo again. ”Give me a run. Send this paper to the education, science and technology office and ask them to make 125 copies of it for the advanced generation examination in mathematics colleges.”
”No problem, professor. I'll go first?”
”Well, go ahead.”
…………
Cheng Nuo returns to the dormitory after busy work.
McGrady was alone in the dorm. What did Cheng Nuo do when he saw him in the door
Cheng Nuo shrugged, ”it's hard to say! In half a month, you'll know what's going on. ”
McGrady: ”Oh.”
…………
Near the final exam.
He remembered that he was a member of the finance department.
Under the supervision of Yan monitor, Cheng Nuo organized the students in the class to start the evening self-study.
Although speaking of the University, self-consciousness is the most important, but if someone in the side of a little supervision, learning motivation will also improve a lot.
As there is only one class in the Finance Department of freshmen this year, there is no good comparison in terms of scores.
Therefore, Cheng Nuo's goal is to ensure that there will be no students who fail in their classes this semester.
However, in addition to advanced mathematics, the remaining courses in the first semester of their finance department are difficult to fail even if they start to review one week before the examination.
Compared with the part of majors that ”as long as they choose their majors well, they will win the college entrance examination at the end of each year”. Compared with those majors who often take more than ten subjects, the students in their finance department were quite happy in the first two academic years.
With the passage of time, the whole campus of Tsinghua University is gradually shrouded in the atmosphere of final examination.
Library seats are rarely full.
The students on the road are also in a hurry, or take a book to review on the school bench.