Chapter 233 (1/2)
”First, we can write X and y as f (x) = T ^ 2-T + 1-x = 0 and G (x) = 2T ^ 2 + T -- y = 0, respectively.”
”Then, (x, y) is made up of some T1...”
On the platform, Zhao Yang talked.
This problem, in short, is a binary system of higher order equations.
As long as the value of R (F, g) determinant is calculated by matrix operation, the correct answer can be obtained.
In addition to the computational complexity, the idea of what for the students of mathematics department, it is not very difficult to come up with.
”Therefore, the curve of this problem satisfies the equation 4x ^ 2-4xy + y ^ 2-23x + 7Y + 19 = 0!”
Zhao Yang wrote down his final calculation results on the blackboard. He looked at Liao Zhixing, who was standing on one side.
Liao Zhixing nodded his head with satisfaction and said, ”it's very good. The thought and calculation result are correct.”
Pa Pa Pa Pa Pa!
The students in the mathematics department applauded spontaneously.
Whoo!
Zhao Yang took a breath and patted his chest.
Finally I didn't disgrace the math department.
Thinking in this way, Zhao Yang glanced at the countdown with complacent eyes Liao Zhixing's attitude towards students is strict and harsh. However, he also knows that Zhao Yang can't solve this problem and is reasonable. Therefore, he did not criticize Zhao Yang too much.
Liao Zhixing nodded, ”yes. The problem is really more difficult. Let's talk about the third question first. We'll come back to the second one later
Zhao Yang, who was granted amnesty, nodded, picked up the chalk on the desk just now and wrote the solution to the third problem on the blackboard.
First of all, let's turn the two formulas into f (x) and G (x), that is, f (x) =... ”
It has to be said that Zhao Yang has a unique talent in mathematics.
Clear organization, smooth thinking, the whole problem-solving process, also rigorous and meticulous. At the beginning of the college entrance examination, Zhao Yang also got a high score of 146 points in mathematics.
If he is given a certain period of growth, he may become a man in charge of the whole department of mathematics in Tsinghua University.
Unfortunately He was born in the wrong era.
…………
”Not bad.” Liao Zhixing took a look at the whole problem-solving steps written by Zhao Yang on the blackboard, and nodded with satisfaction, ”the steps are very detailed, but there is no redundancy. If I were a marking teacher, I would give you full marks.”
”But...” Zhao Yang's face just showed a touch of joy, but see Professor Liao's voice turn, ”even if you get a full mark on this question, but the second question?”
”You won't be able to do the second question, so you get a zero on the second question.” Professor Liao's tone became serious. ”In this way, even if you can write a perfect answer to a question that you can't, it's better to make a question that you can't
Professor Liao started his preaching mode, ”mathematics, students. Mathematics is one of the most important subjects in postgraduate entrance examination. Especially for the students of your mathematics department, mathematics is enough to determine the success or failure of your postgraduate entrance examination
”You can't Scribble about political problems, you can't copy and read English, you can't just write a solution to a math problem!”
The mute Zhao Yang, who was said by Liao Zhixing, stepped down from the platform and returned to his seat. At the same time, we must learn mathematics well!
Standing on the platform, Liao Zhixing took a sip of the water soaked in wolfberry and felt a warm current flowing to his spleen and kidney. He looked around the classroom and said with a kind smile, ”who of you will come up and talk about the second question.”
No response.
There was silence in the classroom, and the needle could be heard.
The students in the mathematics department lowered their heads one by one and did not dare to look into the eyes of Liao Zhixing.
No, not really!
What can they do? They are helpless! I can only lower my head and pretend it's none of my business.
”Why, nobody?” Liao Zhixing still has a smile on his face.
”Come on, that fat classmate Li xiurui. Can you do this?”
Li xiurui stood up from his seat with a black line, ”teacher, I won't.”
”What about Gu Yuan?”
”Teacher, I can't either.”
”You students Liao Zhixing shakes his head helplessly and covers the thermos cup. His eyes fall on Cheng Nuo, who sits in the penultimate row and has been acting as a transparent person.
”Classmate Cheng Nuo?”
Thinking about what to eat for dinner today, Cheng Nuo gets up from his seat vaguely when he hears that he is called by Professor Liao.
At the same time, the eyes of the whole class also fell on Cheng Nuo.
For Cheng Nuo, who had been in class with them for nearly a week, people in the mathematics department still have deep resentment.Why?
Actually, Cheng Nuo is too unsophisticated. He is clearly a finance student. If he doesn't go to the finance department, he just comes to his math department.
If you want to run here, you can run here. We won't say anything.
But it's too much for you to take advantage of our math department in every class!
The first senior substitute class and the first several minute class were clearly the home of their mathematics department, but Cheng Nuo alone robbed them of the limelight of more than 30 people.
And yesterday, the first lesson.
When the professor of jiejie checked the preview results of the students, Cheng Nuo used the class time of many classes just like the class professor, and directly told the main knowledge points and key points of the whole textbook to the people of mathematics department.
At that time, this operation can be described as a stunned mathematics department.
Jieji's teacher, is also a big mouth, full of Leng for more than ten seconds, before slowing down God.
However, looking at Cheng Nuo's eyes, it is not like looking at an ordinary student.
Today's advanced substitute class made people in Mathematics Department feel more friendly that Cheng Nuo has been sitting in the corner of the back row, always in front of the transparent person.
I thought that this class was finally the performance time of their mathematics department, but I didn't expect that none of them would be able to solve the problems given by Professor Liao.