"Can you solve this problem?"
After throwing the phone on the table, Lan Jie casually pulled out a piece of A4 white paper from the desk with a printed Olympiad question on it.
It will take at least a few minutes to wait for Teacher Yuan to come over. I have nothing to do, so I might as well give this guy a test.
This is an example question prepared in advance for the children in the Olympiad class on Friday afternoon, and it is also a very classic Olympiad question. The question stem is: f(x) is a function on Q, (1) f(1)=2, (2) For any x, y∈Q, f(xy)=f(x)f(y)-f(x+y)+1. Find f(x).
Qiao Yu glanced at the question paper on the table and said nothing.
Lan Jie thought for a while and said, "If you solve it, I'll give you one hundred yuan in cash."
Qiao Yu hesitated for a moment, probably thinking that this was the case anyway, so the money delivered to his door should not be wasted, so he replied: "This kind of thing requires money first."
Lan Jie glared at Qiao Yu, but still opened the drawer again, took out a one-hundred-dollar bill, and slapped it on the table.
Oh……
He finally saw a smile on Qiao Yu's face.
"Thank you, boss. This question is the continuation of what they are going to teach in today's class, right? The main test is to compare coefficients. First use the substitution method to simplify the equation, then use the hypothesis method to verify, and then use the comparison coefficient..."
Lan Jie was too lazy to listen to this kid's nonsense, so he directly handed over a pen, and then pointed to the stool on the desk next to him: "Go and bring a stool over and write in the blank space."
Probably because of the one hundred yuan he just put in his pocket, Qiao Yu didn't waste any more nonsense this time. He honestly moved the stool over and sat there to start solving the problem.
Five minutes later, before Teacher Yuan arrived, the A4 paper had already been handed over.
Seeing the handwriting, Lan Jie frowned subconsciously.
It's a very standard dog chew font. It can be seen that the writer is just doing errands. If you don't read it carefully, you can't tell the difference between 0 and 6.
If this were the college entrance examination, just one word would make the marking teacher grit his teeth and deduct a few points first. This would simply make the teacher's job more difficult. But the proof process and ideas are extremely clear, and no mistakes can be found.
"Can you think of any other solutions?" After reading, Lan Jie asked coldly.
Qiao Yu thought for a moment and replied casually: "You can first use special values ​​​​to enter, then construct a function, and then use the properties of the function to analyze. However, that solution is more complicated and requires more writing. Isn't it necessary? 1 It’s only a hundred yuan, why are you writing? My hands are sore.”
Lan Jie wanted to ask, "Your hands are sore after writing these few words? Why aren't your hands sore after playing games all day?" But he still held back.
After all, he is not Qiao Yu's substitute teacher, and the child is obviously very rebellious, so saying this has no meaning except exacerbating the antagonism between the two. It is better to wait until the child's head teacher comes and understands the situation.
To be honest, as a teacher, he was really curious that Tieyi Middle School could have such a weird student.
Mathematics does depend on talent, but to be able to solve Mathematical Olympiad problems so easily, you must have studied mathematics seriously. Otherwise, no matter how smart you are, you will not be able to understand the symbols and you will not be able to solve the problems. But this guy is completely He has an unstinting temper and doesn't look like a good student at all...
So there was an awkward silence in the office again. Just as Lang Jie was considering whether to let this guy do another question, there was a sudden knock on the door, and then a middle-aged woman with a round face walked in.
Very good, saved a hundred.
"Hello, Teacher Yuan." Lan Jie stood up and said hello.
"Hey, Teacher Lan, I'm sorry to cause you trouble."
Teacher Yuan said politely with a smile on his face, and then his eyes fell on Qiao Yu, who was still sitting there. He suddenly lost his temper and said seriously: "Qiao Yu, you are still sitting still. Ah? Stand up and let me ask you, didn’t your mother say that you were not feeling well and were hospitalized? Why did you end up in the hospital in an Internet cafe?”
Lan Jie thought that with Teacher Yuan's attitude, the two of them would quarrel directly in the office. What he didn't expect was that Qiao Yu just stood up with a gloomy look on his face, and then stood there quietly without saying a word.
This also made Lang Jie feel very happy.
At least when facing the head teacher, he didn't show off his 250-year-old attitude of not being afraid of boiling water.
"Look at you, what are you like now? Yes, your grades are not good, but you will take the high school entrance examination next month. Even if you can't go to the general high school, you can get a few more points and go to a private school. Otherwise, you What can I do in the future? Is this my whole life?"
The female teacher started nagging so much that Lan Jie started to feel a headache.
He quickly said: "That Teacher Yuan..."
"Hey, look, I was so busy training the students that I almost forgot that Teacher Lan is still there. How about I take him back first?"
"No, no, I mean, let the child stay in the office for a while, and we can go out and have a chat?"
"Ah?" Teacher Yuan was stunned, obviously not understanding the situation.
What's the meaning?
Let the children stay in the office while they go out to chat?
…
No matter how many questions there were in his mind, Teacher Yuan followed Lan Jie outside the office and to the corner next to it.
If it were any other student, Lan Jie would definitely have asked the student to go out first, but based on his understanding of Qiao Yu, he estimated that this kid would have slipped away as soon as Qiao Yu was asked to leave his office, so he might as well just go out.
"Teacher Yuan, I want to know about Qiao Yu's situation. Can you tell me briefly? For example, how is his math score in the class?"
"Mathematics? How can I say, not very good. Let's put it this way, Qiao Yu's science scores are quite poor, and he has failed in mathematics and biology courses. However, Chinese and English are okay, and he can occasionally pass. Once I also scored over 100 points in Chinese."
Lan Jie frowned subconsciously. Is it okay to pass the exam occasionally?
But when I thought about Qiao Yu being in Class 13, I felt relieved again. After all, grades are determined by comparison. I'm afraid it would be difficult for most people in the class to pass, right? But the scores in this science subject are all very poor...
MMPD!
Although it was not in line with his identity, Lang Jie couldn't help but cursed in his heart.
This kid really fooled everyone.
"Then what score will he get in his birthplace?" Lan Jie asked.
"Let me think about it, yes, it seems to be 18 points."
"One door?"
Teacher Yuan glanced at Lan Jie and said, "Total score."
Lang Jie was speechless again.
Good guy, the total score is 80, and I got 18 in the exam. Lang Jie once again suspected that the kid did it on purpose, and got a perfect score in reverse.
"Why are you so interested in his grades?" Teacher Yuan asked in surprise.
"Ahem..." Lan Jie bypassed the topic and asked, "Is this child's family situation very poor?"
Hearing this question, Teacher Yuan was diverted. He lowered his voice and said mysteriously: "Hey, when it comes to this, I don't know how to explain it. Single-parent families are very strange. You know him?"
How old is mom?"
"Huh?" Lan Jie was stunned, why is this still gossip?
"Qiao Yu's mother is so young, only 34 years old this year."
"What? 34 years old?"
Chapter completed!