204 A method of application of mathematics in love

Holidays make people happy, travel makes people happy, and love makes people happy. When these three happen at the same time, that is the happiness of the power of the third power.

I got up from the bed at six o'clock in the morning, then took a happy shower, finished washing up, put on my beloved youth outfit, looked left and right in the mirror, and felt perfect, and ran into the study and greeted March. Of course, it was just a simple greeting, and said: "I'm going to date, you're good at home!"

Then he turned around and walked out of the house, paced and arrived at the downstairs of the girl's bedroom at seven o'clock on time. What surprised him was that Jiang Chenshuang was already waiting for him at the door.

Obviously the girl also dressed up very much. The clothes were "work clothes" chosen by Yu Xingwei. There was an off-white sweater, a long camel-colored jacket, a pair of light blue jeans and a pair of simple sneakers, which looked youthful and fashionable.

Although Yu Xingwei was not here at this time, Ning Wei still praised him in his heart. To be honest, he admired Brother Yu very much. Although he usually acts very straight, he is quite appreciative when it comes to choosing clothes for girls.

What Ning Wei didn't know was that this actually had nothing to do with the lack of vision. Yu Xingwei just chose a similar brand store according to the fees given by Ning Wei, and then told the girls who sold clothes the request. All the clothes and matching were actually referenced by those girls...

This probably confirms that professional things must be left to professionals to do to be both worry-free and happy.

"What are you looking at?" Although the two had already confirmed their relationship, Jiang Chenshuang still couldn't stand Ning Wei's hot gaze.

"I see you as my future wife!"

Ning Wei gave the standard answer in his heart seriously. His tone was as serious and serious as talking about math problems, which made the girl buried her head again. Then Ning took it for granted and took the beauty's little hand and complained: "What else can I be shy about when I am all told? By the way, have the learning tasks been completed?"

"Yeah!" Student Jiang replied.

"That's fine. If you don't know anything about advanced mathematics and line generation, you can ask me on the way later, but you won't ask when you get to the place. You have to relax wholeheartedly when playing." Ning Wei said.

"Oh, I have read the book but I don't understand it very well." Jiang Chenshuang said honestly.

Ning Wei nodded and replied: "Accompaniment matrix? Well, when encountering the problem of the accompanying matrix, you have to remember some formulas. Let me tell you, the professors in the School of Mathematics will not give you pure accompanying matrix problems. They usually combine them with inverse matrix to set test points. Moreover, this kind of question has a characteristic and many solutions. I will teach you the most clever solution. As long as you see the problem of the accompanying matrix, whether it is a proof or a calculation question, you will start with the formula aa^*a^*aae."

"Some conclusions can be used directly, such as if r(a)n, then r(a^*)n, if r(a)n-1, then r(a^*)1, if r(a)＜n-1, then r(a^*)0. Let me give you an example, let a be an n-order non-zero matrix, a^* is the accompanying matrix of a. When a^ta^*, it is proved that a is not equal to zero. Think about how to bring it into the formula just now?"

Jiang Chenshuang blinked and suddenly found that Ning Wei's few words seemed to make the question that has been bothering her. After thinking about it, she replied: "Oh, then you should directly substitute a^ta^* into aa^*a^*aae and get aa^*aa^tae. Then, using the inverse method, let a be equal to zero and the row vector of a is ai. In this case, aiai^t is equal to zero, and a can be equal to zero, which is contrary to a being equal to zero, so a is not equal to zero."

Ning Wei listened to the answer, looked at the girl beside him with praise and said, "I still don't understand. I think you understand quite well. I just found the simplest way to prove it. Then I'm testing the more difficult questions you have. You are ready, let's set a matrix a..."

In this way, she would rather give an example to the girl around her and then explain it. From simple to difficult, she walked from the dormitory to the gate of the Mathematics Institute for just twenty minutes. Jiang Chenshuang really felt that the accompanying matrix problem that had always troubled her seemed to be no longer a problem. By the way, she also consolidated the concepts of inverse and irreversible matrices...

A very wonderful experience. Really, when I fell in love for the first time, I didn’t know if other people were about the same when they were in love. I just simply felt that if this was love, it would not seem to delay it but would promote learning. No wonder Yanbei University never opposed students falling in love on campus.

When the two arrived at the entrance of the Mathematics Research Institute, a black Audi had already parked at the door and waited. Ning Wei glanced at the license plate. It was the license plate sent to him by his account manager yesterday. After checking the time, it was just 7:20. He made an appointment with the bank to leave at 7:30. It seemed that the driver had arrived in advance, and everyone was very on time today.

The driver was a young master who looked about thirties, wearing white gloves. When he saw Ning Wei bringing Jiang Chenshuang to the door, he immediately got out of the car and said to Ning Wei: "Hello Mr. Ning, I am Chen Guangming who contacted you yesterday. I am also serving you these days. Please get in the car."

"Hello, Master Chen, thank you for your hard work these days." Ning Wei pointed, then pulled Jiang Chenshuang, who was still stunned, to the back seat of the car.

"Where did the car come from?" the girl asked in a low voice.

"I don't know, the services provided by the bank. Don't worry about this. Do you understand everything I told you just now?" Ning Wei explained.

"I seem to understand, but I feel that I need to do more examples to consolidate." Jiang Chenshuang answered honestly.

"Well, if you have any problems with the matrix, then the linear correlation problem must be a slight understanding. Wait, Master Chen, how long will it take to get from school to the Forbidden City?"

"Well, if there is no traffic jam, it will take about forty minutes."

"Oh, that time is enough, thank you Master Chen!"

Ning Wei, who got the answer, turned his head and continued: "I tell you, the correlation or irrelevance of vector groups is a very abstract concept. When you see related questions, you have to pay attention to a group with different meanings from any ancestor representative. The former only requires existence, while the latter requires everything, emphasizing arbitraryness. For example, I give a condition, there is a vector group a1, a2...as, and there is always 0a1+0a2+...+0as0. Then whether vector groups a1, a2...as...as is linearly related. In fact, what I asked is whether another group of k1, k2...ks can be found in addition to the situation I just mentioned, so that k1a1+...has is true.

"It sounds very simple, right? Let me give you another example, let a be an n-order matrix and a is an n-dimensional column vector. If a^m-1a is not equal to zero, and a^ma is equal to zero, it is proved that the vector groups a, aa, a^2a,... are linearly irrelevant."

The question is really about the question. The only thing that is a little too much is that Ning Wei, who was sitting in the car and explaining the question to the girl beside him, was no longer satisfied with holding his hands, but took it for granted, and he hugged the girl's waist when he was giving the question. Of course, he did not stop in his mouth, and even used examples to get freely. Although his speech was not fast, Jiang Chenshuang had to concentrate to keep up with the rhythm of Ning Wei's narration. The facts prove that people will really ignore the surrounding situation when they are extremely focused.

So it was not until classmate Jiang began to think about the example questions given by Ning Wei, and when he had a result, he suddenly realized that he seemed to have reached Ning Wei's arms. What happened?

But before she could twist her body, Ning Wei continued, "Didn't you figure out the proof steps? You have to think about the problem based on the previous mathematical concepts."

Student Jiang replied uneasyly: "I figured it out..."

"I figured it out and you said it. If you don't say it, how can you know you figure it out?"

"Just say that?" Student Jiang twisted his body unnaturally.

"Uh? Is there anything wrong? This is not a secret question. The simplest issue of the line generation. Are you still afraid that the driver will know? When studying, you should focus and focus on your mind. Do you know that there is a stable mentality of not changing your color? Especially when studying mathematics, you may miss a knowledge point because you are distracted and missed, and you will not understand the subsequent questions. You see, you are not focused enough when studying and thinking about problems, and you will just think about some messy things. This is not enough." Ning Wei said with a heartbroken education with a sad look on his head.

This seemed to make sense. Jiang Chenshuang couldn't find a reason to protest or object, so she had to lean in Ning Wei's arms obediently and whisper: "Oh, just use the definition you mentioned before and use it together, set it first..."

"Well, that's right. This idea is completely correct, but it's not the easiest way. In fact, there is another small trick. When you get K2a^m-1a0, you can directly substitute K1 equals zero into the equation, and then you can directly draw the conclusion. Next, I'll give you a more difficult question to debut..."

Ning Wei was very happy about his speech. Not only did he feel complacent and excited in his arms, but he felt that Jiang was so smart that all the knowledge points were almost thoroughly explained. Of course, he also had his functions. Ning Wei did not follow the contents of the textbook step by step, but based on his understanding, he crushed all the key points and difficulties, and then clearly analyzed the context and analysis...

Just as the car was parked in the parking lot that was very close to the Forbidden City.

Ning Wei really doesn't know that ordinary cars can't get in here, especially on special days like National Day. Naturally, he didn't know that in order to do this, the bank specially prepared a temporary special pass for the car he, a vvIP customer.

After pulling classmate Jiang out of the car openly, he was recognized by a middle-aged woman who had just gotten off the car and probably came to the Forbidden City to play.

"Hey, you are Ning Wei? Wow, Ning Wei's God of Learning, my son admires you the most. Can you take a photo with you? This is your girlfriend, right? Let's take a photo together?"

How to say it is Ning Wei's first time when he went out for a trip, he actually met his fan's mother asking for a photo. However, Ning Wei has experience of this kind of thing. He had encountered many times when he was in Jiangda. When he was in a good mood, he pulled Jiang and asked the other driver to help him take several photos. After saying goodbye with a friendly goodbye, he officially started today's journey.

"By the way, I discussed with Senior Brother Lu yesterday. Senior Brother Lu suggested that my sister just come to our school's affiliated high school to study. What do you think?" Ning Wei held his girlfriend's little hand in a refreshing autumn weather and asked with a refreshing look.

"If you can come, of course it's best. You can take care of your sister nearby, but didn't you say you were an only child? Is it your cousin or cousin?" Classmate Jiang asked.

"My father and mother are both the youngest in the family, so how can I have a cousin? I have two cousins. I'm talking about Jiang Chenlu. Isn't your sister my sister? Since you think it's good, I'll ask her what she thinks tonight. If she agrees, I'll go find someone to make arrangements when you look back. In this way, you can take care of her nearby." Ning answered for granted.

"Ah? Are you talking about Chenlu? No, right? And you have to bother others. It's very troublesome to apply for borrowing. Let's not bother others, okay?" Jiang Chenshuang was stunned, and quickly shook Ning Wei's arm and said.

"Please bother others? I'll tell you. Now our Director Tian is afraid of not bothering him. Really! If you don't believe me, I'll call our Director Tian now. Ask him. If I don't ask him for help during my doctorate, will he feel uneasy? If I ask him for such a small matter, he has to thank you and Chenlu for giving him such a simple opportunity to help him! This is not what I said, it was analyzed by Senior Brother Lu. If you dare to ask Director Tian, ​​you can ask Senior Brother Lu after the holiday! This is my bragging story. Director Tian said, let me tell him before posting on Weibo. As long as I agree, he can do whatever he wants!"

Ning Wei said confidently.

Jiang Chenshuang looked at Ning Wei blankly. She could understand the math problems just now, but when she asked the tutor for help, the tutor had to express her gratitude, it was really beyond her understanding.

"You don't understand these things, the story is very complicated. But there is one thing you should understand. The teacher's teaching level has a direct impact on students' academic performance. This is why teachers have always been valued by parents. The simplest thing is, I just explained to you the difficulties of the line generation to you, do you think it is easy to understand?" Ning Wei turned his head and asked.

Jiang Chenshuang nodded subconsciously. This was indeed not an exaggeration. She really felt that she had been crushed by Ning Wei and could understand the things she had memorized before almost instantly.

"Look, then do you think the teaching staff in our capital is stronger or the teaching staff in a small county or town in your area is stronger? The first grade of a non-provincial key high school is not safe, Chenshuang! The college entrance examination is a lifelong thing, so it's okay to imagine it. Now that we have the ability to solve the problem, can we let Chenlu lose at the starting line?"

The logical lines are expressed very closely, especially when using their own teaching methods as arguments, which makes Jiang Chenshuang unable to express any objection at all.
Chapter completed!