Chapter 84

After Chu Lingfeng solved the left and right Dharma guards of xuesha gate, he walked slowly towards the hillside.

Those people on the mountain were obviously shocked by Chu Lingfeng's strength, and the two Dharma protectors of his sect died easily in his hands. At this time, they watched Chu Lingfeng slowly lean towards them, and ran one by one. They quickly got on the car and left without looking back.

Chu Ling Feng looks at them this appearance to laugh, disdain of say: "200000 people all remove armour, rather no one is a man, really a gang of counsellors."

Looking at those people driving away one by one, Chu Lingfeng also turned around and wanted to leave. However, he saw the woman standing in front of him, her pretty face was slightly red, and said: "you go, I can't save you today, not to mention I have a grudge with these guys."

The woman obstinately looked at Chu Lingfeng. For a long time, she seemed to make up her mind. She took off a jade finger from her hand. Her eyes were full of sadness. She gently stroked it. Then she handed it to Chu Lingfeng and said, "thank you for your kindness. This finger is handed down from my family. Today, you saved me twice, and this finger will be given to you in return."

Seeing the woman's appearance, Chu Lingfeng solemnly took the trigger, nodded his head and said, "in this case, you and I don't owe each other. Let's forget each other in the world."

The woman also waved, and the two said goodbye.

After Chu Lingfeng left, his thoughts were like a mess. He wanted to find a quiet place to sort out his thoughts, but he inadvertently went to Jingzhou University and came to the library.

Chu Lingfeng stood at the door for a long time before he went in.

Just did not expect, passing a girl's side, his mobile phone suddenly rang up.

When the girl heard the bell, she raised her pretty face and said to Chu Lingfeng angrily, "don't you know that the mobile phone in the library is silent? Well, I'm about to solve this problem. Now I'm confused by you. What do you say to do? "

The other people in the library heard the girl's words and gathered around them one after another. When they saw the girl, they all gloated at Chu Lingfeng and said, "how can this boy offend our school flower? It's over."

"I'm afraid the boy will soon be bored to death by the so-called" flower protection envoys "who are just like those flower crazies."

Chu Lingfeng listened to the whispers around him and sighed. He didn't want to make a fuss. He read the title of the girl's book and said faintly: "in this case, I'll teach you how to solve this problem."

"Just you? Classmate, I don't look down on you, but this problem is a Mathematical Olympiad problem. There is no one I don't know in the Department of mathematics. Since you look so familiar, it must not be from the Department of mathematics. In this case, I really don't believe you can solve it. " Although girls say so, but looking at Chu Lingfeng's eyes or with disdain.

Chu Lingfeng didn't say much. He picked up the pen and paper, glanced at the topic, and began to write down a series of equations quickly.

The girl looked at Chu Lingfeng's equation, dismissive, because she didn't think Chu Lingfeng could deduce anything.

After Chu Lingfeng stopped writing, he looked at the formula listed by the girl, waved to the girl, and then said, "your solution is actually OK, but it's a little stupid. There are a lot of unnecessary formulas and a lot of auxiliary lines in the middle. In fact, it can be exactly like me. "

Chu Lingfeng finished and continued to draw on the draft paper with a pen.

The girl heard Chu Lingfeng say that his method seems a little clumsy, not angry said: "then your method is very clever?"

Chu Lingfeng heard this sentence, but did not pay attention to it. Instead, he said: "you see, I made some auxiliary lines and guide lines. How do they look now? Is it a lot clearer? "

At first, the girl was still dismissive, but looking at Chu Lingfeng's drawing and equation, she was gradually surprised that she couldn't close her mouth. She said, "how can it be? How could this problem be solved by calculus? "

All the people around her were very surprised to see the girl like this. Obviously, they all know that the girl is not only good-looking, but also one of the students in the mathematics department. It's obvious that Chu Lingfeng's method is much better than her.

Chu Lingfeng looked at the girl with a smile and didn't hate her, so he continued: "you made a mistake in the subjective consciousness of this problem. I don't know who told you that calculus can't be used in this problem, but after some assistance, it's obvious that calculus is the easiest and clearest solution to this problem."

The girl looked at Chu Lingfeng and said, "it's my teacher. He told me that calculus can't solve this problem, so I didn't think about using calculus to solve it."

The girl said here, with a wry smile, and continued: "but with such a delicate equation, it's no wonder that the teacher told me that calculus can't be solved. After all, even if the teacher doesn't say so, I'm afraid I can't think of it."

Chu Lingfeng said with a smile: "the person who worked out this problem really has some skills. He has set such a clever trap, which makes people mistakenly think that calculus can't be used. However, if we get rid of this trap, it will be as clear as the clouds and the sun."

The girl nodded her head, and then said: "you are so powerful, are you also the teacher of our mathematics department? I heard that there seems to be a new teacher in the doctoral group of our mathematics department, but since he is a teacher in the doctoral group, he can't be as young as you are

Chu Lingfeng laughed and said, "I'm really a teacher, but I'm not from Jingzhou University."

Chu Lingfeng said that and sat there, thinking of his lovely disciples. From Zu Chongzhi to Chen Jingrun, they all became a generation after Chu Lingfeng's instruction. However, the world did not know that the first person to put forward PI was not Zu Chongzhi, but Chu Lingfeng. He first accurate pi to the ten digits of the decimal point, and in which era, As widely known, Zuli is not just the last two.

And the girl heard Chu Lingfeng's words, said enviously: "that your student, certainly also very formidable."

Chu Lingfeng showed a touch of sadness in his eyes, and his words were full of regret. He said faintly: "I only remember that one of my recent apprentices, whose surname is Chen, has been gone for more than 20 years."

The girl thought he was joking and said: "how old are you? Twenty years ago, I'm afraid you're not even a primary school student, but you still teach people?"

Chu Ling Feng can't deny to smile, want to turn around to leave
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