"What you said is indeed very reasonable," Tong Wangjun nodded, "The general idea is just an illusion, many questions actually don't know how to answer, but after reading the answers, when I push it back, I think it's simple." It's because I'm not good enough at the subject to make mistakes. ”

"In fact, you don't have to be so rigid in doing math problems, you can learn math more happily and understand the inherent charm of math. For example, the functions we have learned, what the function is, and what the origin is, are not mentioned in the textbook, but they just teach us how to do the problem, give us some formulas, and let us memorize them. ”

"Standing on the shoulders of predecessors can indeed save a lot of trouble and save a lot of time, but it is easy to swallow dates, unable to grasp the essence of things, and not knowing why you do it. "Do you know what the word function means?"

Tong Wangjun shook his head.

Most people don't know that these two words are translations, and Li Shanlan, a mathematician in the Qing Dynasty, translated function into functions when he translated the book "Algebra". In ancient China, the word "Han" and the word "Han" are common, and both have the meaning of containment. The definition given by Li Shanlan is that the mortal formula contains heaven, which is a function of heaven. In ancient China, the four characters heaven, earth, man, and thing were used to represent four different unknowns or variables. So a function means that a formula contains variables, and the definition of an equation means an equation that contains unknowns. However, in the early mathematical treatise "Nine Chapters of Arithmetic" in China, the term equation refers to a simultaneous one-dimensional equation containing multiple unknown quantities, that is, the so-called linear equation system. "Awakening is like an endorsement.

"Where did you get all this?" Tong Wangjun felt incredible, "I haven't heard of it at all, your knowledge is so rich, no wonder you can do so well in mathematics."

"If you look at it, you actually saw it when I was surfing the Internet not long ago. Su Xing said with a smile, "It is not necessary to figure out the origin of the function, but to say that a little clear background of these two words will make the word function more vivid, so that it feels less alienated, and it is easier for people to get close, to learn, to taste its connotation, and to improve academic performance." ”

"For example, if you don't understand the principle of magic, outsiders will feel very profound, very surprised and mysterious, but as long as you analyze the magic, you will find that the original amazing magic is actually so simple, some even a child can do it, and mathematics is almost the same. In fact, we should know the essence of everything, rather than staying on the surface of things, so that things will look less mysterious and more intimate. ”

The words that Su Xing said to Tong Wangjun were his feelings after he became an adult, but unfortunately he was already middle-aged at that time, and once many opportunities were lost, even if he had feelings later, if he wanted to make up for it, the difficulty would increase a hundredfold and a thousand times.

People say that it is not too late to make amends, and the truth is true, but in fact, if you are prepared for danger in times of peace at the beginning and fill all the loopholes, there will be no more sacrifices and no more losses in the future, wouldn't it be better?

However, there are not many students who can have this time and experience to understand the more interesting side of mathematics like Su Xing, time does not allow it, and the conditions do not allow it.

The awakening is also because I have long understood the knowledge of high school, and I am easy to learn, so I have more time to do other things and expand my thinking.

This is like people who study philosophy in college, in fact, most of the students who take these courses are not from poor families, and it is difficult for ordinary students to make ends meet after graduation.

People must first learn to survive before they can live.

The same is true for most students, who have to get good grades before they can go deeper.

Tong Wangjun stayed in the awakened house for about 20 minutes and then went back.

It's late, so after taking a shower, go to bed.

Tong Wangjun was lying on the bed, a thin blanket, one corner covered his stomach, stroking the mosquito-bitten bag on his wrist, a little difficult to sleep.

I woke up and slept soundly.

By Friday, the bubble tea shop was all renovated, and the logs under the counter woke up to listen to the suggestion of the bear soldiers, and found someone to put up a poster.

The slightly stiff counter suddenly came alive.

"You have these two packs of cigarettes. Wake up and settle the bill, and buy two packs of good cigarettes for Xiong Bing.

"Thank you. Xiong Bing didn't shirk this time, and took the two packs of cigarettes in his hand.

"You're doing a great job, I'm satisfied, and you deserve it. Wake up and say, "You've got a new job?"

"Not yet, there are too many people looking for work, I have been working with you for the past few days, I haven't been to Mingtang to guard, and I have a job for someone else. Xiong Bing shook his head.

"The house in my hometown is restarted, and I may have to make some cabinets, and it will take about half an hour to take a car from the city to my house, and then walk for more than ten minutes, can you take on such a job?"

"Where is your hometown?" asked Xiong Bing.

"Duandian Town. Su Xing said, "My fourth uncle is a mason, and the house in the family is what he helped do, you two can get to know each other, and if you have a job in the future, you can also introduce each other to do it, he has good skills." ”

"How long has your house been up?" Xiong Bing said, "Duandian Town is not too far away, I know, I have been there, I can do it." ”

"It's only been a week. Su Xing said.

"It will take some time to be able to do it, and the renovation will have to wait until the frame of the house is up. When the house is finished, you tell me about it, and I'll just go over there. Xiong Bing said, "When I don't usually get a job, I usually wait for a job in Mingtang, and you can find me when you go there." ”

"Do you have a cell phone?" said he thought it would be more convenient to make a phone call.

"That thing costs two or three thousand yuan, how can you afford it. Xiong Bing shook his head.

"Then when the house at home is almost finished, I'll go to Mingtang to find you. Su Xing nodded, mobile phones are not generally close to the people, when the network is not developed, there should be more time, but it is indeed inconvenient to have no mobile phones, and you can find someone to say face-to-face.

On Friday, the last class in the afternoon is the time for the class meeting.

"This class is going to change places. Before class, Luo Yajie revealed a message to Su Xing.