Chapter 3 A single-parent family that explodes the worldview
“Can you solve this question?”
After throwing the phone on the table, Lan Jie casually pulled one out from the desk A4 white paper 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 a sample question prepared in advance for the children in the Olympiad class on Friday afternoon. 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, "I'll give you a hundred yuan in cash if you solve it."
Qiao Yu hesitated for a moment, probably thinking that it was already like this anyway, and it was delivered to your door. He didn’t want the money for free, so he replied: “This kind of thing always requires money first.”
Lan Jie glared at Qiao Yu, but still opened the drawer again and took out a one hundred note. , slapped on the table.
Huh...
He finally saw a smile on Qiao Yu's face.
“Thank you, boss. This question is the continuation of what they are going to talk about in today’s class, right? The main test is to compare the coefficients. First use the substitution method to simplify the equation, then use the hypothesis method to verify, and then use the comparison coefficient ..."
Ran Jie was too lazy to listen to this kid's nonsense and handed it over directly. He put a pen over and pointed to the stool on the desk next to him: "Go and bring a stool over and write it in the blank space."
Probably because of the one hundred yuan he just put in his pocket. This time, Qiao Yu didn't talk nonsense anymore. He honestly brought the stool over and sat there to start solving the problem.
Five minutes later, before Teacher Yuan arrived, the A4 paper had been handed over.
Seeing the handwriting, Lang Jie frowned subconsciously.
It is 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, the marking teacher would have to gnash his teeth before deducting a few points for just one word. This is purely to 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, but that solution is more complicated and requires more writing. Isn’t it necessary? It’s only 100 yuan, but 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 obviously has a serious rebellious mentality. Saying this has no meaning other than exacerbating the antagonism between the two. Let's wait until the child's class 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 won’t be able to understand the symbols and you won’t be able to solve the problem. However, this guy is completely free-spirited and doesn’t look like a good student at all...
So the office fell into awkward silence again, while Lang Jie was thinking about whether to let this guy do the questions again. Suddenly, there was a 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 the big thorn sitting there Qiao Yu over there suddenly lost his temper and said seriously: "Qiao Yu, are you still sitting still? Stand up, I Let me ask you, didn’t your mother say that you were not feeling well and were hospitalized?”
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 temperament.
"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, how much do you have to do? It’s okay to get into a private school with a few points, otherwise what can you do in the future? Do you just have to rely on...”
The female teacher started nagging until 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 be here Stay in the office for a while, let’s go out and chat?”
“Huh?” Teacher Yuan was stunned, obviously not understanding the situation.
What does it mean?
Let the children stay in the office while they go out to chat?
...
No matter how many question marks were in his mind, Teacher Yuan followed Lan Jie outside the office and to the corner next to it.
If it were another student, Lan Jie would definitely have asked the student to go out first, but based on his understanding of Qiao Yu, he estimated that as soon as Qiao Yu was asked to walk out of his office, this kid would just slip away, so he might as well just let him go Get out and forget it.
"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 do you say it? Well, it's not very good. Let's put it this way, Qiao Yu's grades in science are quite poor, and he has failed in mathematics and biology courses. However, Chinese and English are okay, and he can occasionally pass the Chinese exam. Many points.”
Lang 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, the results were determined by comparison. I'm afraid it will be difficult for most people in the class to pass, right? But the scores in this science subject are very poor...
MMPD!
Although it was not in line with his status, Lang Jie couldn't help but cursed in his heart.
This guy really fooled everyone.
"Then how many points did he get in his birthplace?" Lan Jie asked.
"Let me think about it, yes, it seems to be 18 points."
"One subject?"
Teacher Yuan glanced at Lan Jie and said, "General "
Lan Jie was speechless again.
Good guy, the total score is eighty, and I passed the exam eighteen. Lang Jie once again suspected that the boy did it on purpose, full marks in the opposite direction.
"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 really Being diverted, he lowered his voice and said mysteriously: "Hey, when it comes to this, I don't even know how to explain it. It's a single-parent family, and it's very strange. Do you know how old his mother is?"< br>
"Huh?" Lan Jie was stunned, why is this still gossip?
"Qiao Yu's mother is so young, she is only 34 years old this year."
"What? 34 years old?"
Around him? He's not married yet, so his kids can skip school and go to Internet cafes?
(End of this chapter)