sugar in sugar

"Cauchy's median value theorem is an extension of Lagrange's median value theorem, which belongs to the differential median value theorem. When g(x)=x, it is the Lagrange median value theorem, so the Lagrange median value theorem is its A special case of [g(x)=x]. At the same time, the requirement is also that the closed interval is continuous, the open interval is derivable, and g(x) is not equal to 0..."

Halfway through Lu Heng's talk, he found a girl who was looking down at something with her head down.

Dare to sneak around and do other things in the high math class?I'm really not afraid of failing.

"The final conclusion of the median value theorem of integrals is a closed interval, while the transformation of the Lagrangian median value theorem is an open interval." Lu Heng continued to speak calmly, while approaching the girl.

"Student, tell me what is the difference between Lagrange's mean value theorem and integral mean value theorem?" He knocked on the table.

"Ah? Ah?" The girl looked up blankly.

Lu Heng noticed that the girl's eyes were red, and there seemed to be tears in her eyes.As for?Did I scare the students to tears with such a vicious look?He stretched out his hand and took the book that the girl was holding in his hand. When he looked at the cover, he almost froze. Isn't this his novel Gale?

But Lu Heng has been a teacher for so long after all, he put on a nonchalant expression on the surface, took the book in his hand and turned around, "Come find me in the office after class later."

After class, the girl came to the office tremblingly, "Lu... Teacher Lu."

Lu Heng tapped the book, "Do you like reading this very much?"

"Mr. Lu, I was wrong. Please return the book to me. I spent a lot of money to receive this signed copy. I promise, I will never read novels again in class."

Lu Heng raised his eyebrows, "It took a lot of money to collect it? How much?"

The girl compared a number, and Lu Heng almost spit out the water he just drank, "Where did you get so much money?!"

The girl pinched the corner of her clothes, "Half a month's living expenses..."

Lu Heng sighed, "You still have to do what you can to buy this kind of thing. In order to buy this book, you let yourself only eat instant noodles for a month. If you know what you like, you will think it's not worth it. That's fine. , take it back." Lu Heng pushed the book in front of the girl.

"Thank you, Mr. Lu!" The girl happily left with the book in her arms.

Lu Heng thought, children nowadays are too hardworking, right?If it was him, he would rather eat delicious food with so much money.

There was no class in the afternoon, and Lu Heng was thinking about the promise yesterday that his family, Juju, would update on time today. After lunch, he planned to drive back, but the result was that something happened to the unsatisfactory car today, and it couldn't start.

In the end, Lu Heng had no choice but to call the repair shop to have the car towed away for repairs. He went outside the school to find a shared bicycle and planned to ride it home.

In the end, after walking a long way, I found a car that rang everywhere except the bell...

Lu Heng rode his bike forward twisting and turning, attracting countless people's attention along the way.

The phone rang, and Lu Heng picked up the phone while riding his bicycle. It was Xu Ran, his best friend in high school, "Hey, old Xu, what's the matter!"

"Old Road, do you want to go out to eat hot pot on weekends?"

"Okay! You please?"

"Tsk, old Lu, you just want to take advantage of me, okay, please! I have a new girlfriend, let me introduce you."

"Yo, how old is this? Let me guess if this time can last more than a month?"

"Shut up, you! This time, this one will definitely get married!"

"I remember you said that in the last one, the last one, and the last one."

"Lu Heng, don't go too far! You are the jealousy of a single dog!"

"Hahahahaha..."

Lu Heng was smiling, and suddenly a car rushed out in front of him. Lu Heng hurriedly braked, only to find that the brakes of this broken car failed!

What the hell! ! !