Urban Shared Boyfriend System

Lu Xiqing used an ironic tone for these words, especially when he inadvertently revealed the information that "He Xuan is pursuing Dong Zijin". He knew that Teacher Lian was most disgusted with the phenomenon of puppy love among high school students.

Therefore, he thought that these words were a blow with a hammer, which could make Mr. Lian's impression and attitude towards He Xuan even worse.

however……

To his surprise, upon hearing this, even the corners of the teacher's lips curled up slightly, and he said approvingly: "That's great! You are high school students now, and talking about love affairs is useless, but... if I can really work hard for the girl I like, and become an excellent person through hard work, I think...it is very meaningful!"

"I go!"

Lu Xiqing didn't expect that her own words... had the opposite effect, why even the old man admired He Xuan instead.

Similarly, upon hearing Lu Xiqing's words, Dong Zijin's heart was shaken like a bolt from the blue.

"He Xuan is studying hard for me?"

"Usually, his words and actions to deal with me, are they all deliberately done to show me? Secretly, are you working hard?"

"Impossible! His grades are so poor, why does he seem to be working hard?"

"However, today he did the cloze, and the answers are almost all correct, so what?"

"And now, why does He Xuan dare to go up and do this question? This question...is really not that difficult, can he really solve it?"

……

All of a sudden, Dong Zijin's heart was really up and down.

In the three years of high school, there were many boys who pursued her, and almost all of them had excellent grades. They made a lot of efforts to please and pursue Dong Zijin.

However, in the face of these, Dong Zijin was unmoved at all, thinking that these boys were very naive.

But now she is facing He Xuan, if... a poor student like He Xuan is really studying hard for herself, then what kind of motivation should I be for him!

But there is another point, Dong Zijin couldn't understand why he was so impatient and disgusted when he usually supervised He Xuan's homework and study by himself?

……

At the stall where Dong Zijin was thinking wildly, He Xuan had already picked up the chalk and began to answer questions on the blackboard.

First of all, of course, it is necessary to write a big "Xie" word gorgeously.

Solution: Find the derivative function, you can get f′(x)=(x^2-ax+1)/x^2

∵ function f(x) has no extreme value,

∴ The equation x2-ax+1=0 has no root or unique root on (0, +∞).

∴ The equation a=x+1/x has no root or unique root on (0, +∞).

……

brush brush...

In a smooth flow, twenty or thirty lines of problem-solving formulas and proofs appear line by line on the blackboard as quickly as printing.

He Xuan moved quickly, as if he didn't need to think, and he didn't even look back after writing the formula line by line.

brush brush...

At this moment, the entire classroom was silent, only the sound of the chalk in He Xuan's hand rubbing against the blackboard.

Everyone was stunned!

When did He Xuan, who was at the end of the crane in the class, become so powerful?

This type of question is often used as the finale of mathematics in the college entrance examination!

Even a top student like Dong Zijin still has to review the questions for a few minutes before he dares to write down the answers. When solving the questions... it's easy to check and check repeatedly!

But He Xuan did a great job, he didn't even need to type out the drafts and calculation formulas, he just printed the standard answers line by line.

pat!

After writing the last line of "It is proved by this", He Xuan threw the remaining chalk stubs into the chalk box very coolly.

Then turned around, He Xuan showed a slight smile, and said to Teacher Lian very modestly: "Teacher, can you see what I did right?"

"Yes! Yes, yes, yes... absolutely correct! Every step is very standard and concise, especially the final proof of inequality. Student He Xuan, I think you didn't even think about it when you did it? How could you do it so well? quick?"

Even the teacher was taken aback. He asked himself that even if he did it by himself, he still had to write a few lines and pause. It was impossible for him to be as fluent and fast as He Xuan.

"Thinking about it! When I was writing the first question, I had already thought about how to prove the last question. However, this type of math problem is all the same, and there is no difficulty at all. There are only a few kinds of problems. The idea of ​​solving the problem is quite simple..."

After speaking, He Xuan patted the chalk dust on his hands and walked back to his seat.

But what he said just now seemed like an echo, constantly echoing in the minds of all the students.

"It's quite simple..."

"simple……"

"Single..."

"of……"

"..."

Chapter 31 Shooting Your Own Feet

Faced with the ridicule of the whole class, he went up to do the questions, but walked off the stage facing everyone's admiring eyes.

This feeling...is cool!

It's just so cool.

I don't know when it started, but He Xuan never had the feeling of being worshiped as a "student bully" again.

Since God rewarded him with the "Shared Boyfriend System", He Xuan decided to maximize the use of these props given by the system to change his state. Who said that he who has been decadent for three years...can't rise again?

look!Didn't this math problem that made the whole class have a hard time solve it in front of me?

"How...how is it possible? How could He Xuan solve such a difficult topic so easily and so quickly?"

Lu Xiqing, who was waiting to see a good show, was completely dumbfounded.

"Amazing! Isn't He Xuan's math always bad? Could it be that he really worked hard for the sake of the class monitor, turning from a scumbag to a top student?"

"I can't believe it? I remember that He Xuan's grades in the monthly exam last month were a mess! In such a short period of time, he has improved so much? I don't believe it."