Chapter 383 Derivatives in Memory
"Mom, I'm going to brush up on the questions, I can't even learn if you talk like this. ”
"Well, I've also seen it through, girls, you still have to study hard and improve yourself, so that one day you can have the confidence to face any emergencies. ”
"Mom, I found that your speech is getting more and more level, deep and thoughtful, Mom, your IQ seems to be high!"
"What is a high IQ, it is that I have experienced a lot, and there is that I was nurtured by you with Uncle Wang, well, who I am with is really important. ”
"Mom, when I was with him, I also felt that I couldn't help but improve, and he broadened my horizons. ”
"Alright, alright. ”
Mother Qian said that Uncle Wang was good, but she didn't expect Qian Xiaoxian to climb along the pole and transfer to Gao Jian.
Qian Mu sighed and said: "There is no sense of security for those with a low IQ, and there is no sense of security for those with a high IQ, only you can give yourself a sense of security, you still don't pin your hopes on him, or that sentence, if you can't get into college this year, then you will take the exam next year, and you won't be able to take the exam all the time, and if you can't pass the exam, don't want to be with him." ”
Mother Qian was really stimulated.
From her own body and from the people around her, she finally realized that a woman must pin her hope on herself to win.
She felt that she woke up too late, and she didn't have the time and energy to change her life, so she must not let her daughter go her way again.
Her daughter is still young, and she still has a chance to change her fate, this time, she wants to give her daughter a good grasp of life, and the most important thing at the moment is not to let her fall into Gao Jian's feelings, and she can't waste time and energy, so she has to stop them.
At this time, there was movement outside.
Mother Qian opened the door and saw Gao Jian come out of the bathroom and go to the living room, she walked to the living room and said, "Are you awake?" I haven't cooked yet, I want to wait until you wake up and ask what you want to eat?"
Gao Jian said: "Auntie, I just asked for takeout, because I want Western food, I don't know if you like it, you see, if you don't like it, I'll buy you another Chinese food?"
"Western food?"
"Actually, those desserts are delicious. ”
Qian Xiaoxian also said: "Mom, don't you also eat birthday cakes? ”
Mother Qian doesn't eat beef and mutton, and even milk powder hates it, but she doesn't hate the cream in the birthday cake, maybe after processing, the cream doesn't have a bad smell.
"Oh well. Since you asked for takeout, I won't cook. ”
Gao Jian asked, "Where is Lin Wei?"
Mother Qian hurriedly said, "He went home." ”
"Didn't you say you would go to a friend's house the day after tomorrow?"
"His family has an urgent matter. ”
"Oh. Gao Jian thought for a while and said, "Since he is gone, then I will go back tomorrow, Qian Xiaoxian." ”
"Huh?"
Gao Jian suddenly called her, Qian Xiaoxian was stunned, why did she suddenly call her like this?
"I looked at all the math mock papers you did recently, and I found that derivatives are your weak point. ”
"Well, yes, I have a headache when I think about it, there are always mistakes in the derivative, I'm all messed up, and I don't know where to start. ”
"I'll be back tomorrow, so I'll try to figure it out to you tonight. ”
What, what? Do you want to give her a lecture?
Mother Qian turned her head to Qian Xiaoxian and said, "Go and bring the roll to the living room, and let him tell you quickly."
Qian Mu said and sat down on the sofa first, thinking, it's the last night, it's best to be in the living room for safety, of course, I want to accompany you to the end!
Qian Xiaoxian also felt that she was indeed too uncomfortable in the bedroom, especially under her mother's watchful gaze, she felt that her back was numb and crispy.
It's still the living room, she took a stack of rolls and a stack of scratch paper, these days because her phone was confiscated by her mother, she lost contact with the math teacher in the tutorial class, so the problem of derivatives here has been bothering her.
Unexpectedly, Gao Jian just flipped through the scroll yesterday and saw her weaknesses, which made her admire her very much.
Yesterday, because she was under her mother's gaze, she was embarrassed to ask more, and now Gao Jian wants to help her solve these problems.
She was even happier that it was another night to be with him.
Gao Jian took out his mobile phone and opened the document and said, "This is the main point of reviewing the derivative that I summarized for you." ”
Qian Xiaoxian leaned over and looked at it and said, "Do you want to send it to me?"
"No, I just wrote a rough outline on the document, and I have to explain the details to you slowly. ”
"Hmm. ”
Gao Jian continued: "Key points (1) are to be proficient in the derivative formulas of each basic elementary function, the derivative rules of sum, difference, product and quotient, and the derivation of composite functions. ”
"Point (2) is that for a composite function, it is necessary to clarify the intermediate composite relationship and figure out which variable should be derived from each decomposition function. ”
Speaking of which, Gao Jian looked up at Qian Xiaoxian and said, "Do you remember it?"
"Hmm. Qian Xiaoxian turned her face and said to her mother: "Mom, where is my mobile phone? Yours is okay, I'll record it." ”
Her mother had no choice but to take out Qian Xiaoxian's mobile phone and hand it to her. Qian Xiaoxian found the recording and said, "It's started." ”
Gao Jian nodded and said: "I have looked at the college entrance examination papers in recent years, and I found that there are basically two types of questions in the derivative common test, the first is to find the derivative of composite functions. The second is the function feature, and the most common question is the most commonly examined.
When Gao Jian said this, he remembered a knock at the door, and Qian Xiaoxian stood up and said, "It's a takeaway?"
Gao Jian took the phone and looked at it and said, "Yes." ”
"I'm coming, you hurry up and finish the topic early, so as not to affect your sleep. ”
Qian Mu said and walked quickly to the door, because she was in a hurry, her body was a little shaky, and her legs were a little limped.
Certainly, she is still recovering, as the doctor said, she has been paralyzed for two years, and it is a miracle that she can return to her current condition.
Qian Xiaoxian had no choice but to sit down again, the two of them couldn't help but look at each other and smile, Gao Jian leaned over and whispered: "I suddenly feel that this way is very interesting and exciting." ”
"......" Qian Xiaoxian pushed him away, she hurriedly stood up and turned her face to look at her mother: "Mom, I'll help you." ”
"How much did he buy?"
Mother Qian handed Qian Xiaoxian two big food bags, she took two big bags from the courier, she closed the door, carried the bags to the coffee table and said, "Buy so much, how can you eat it." ”
Qian Xiaoxian remembered that when she had Western food with Gao Jian for the first time, Gao Jian bought Fang Yuan a lot like this.
She said, "Mom, that's how he buys things. ”
Qian Mu said: "Even if you have money, you can't be so extravagant, and if you have money, you have to be careful with your budget." It's a shame to waste it if you can't eat it. ”
"Auntie, you can give Xiaoxian a night meal, and the shelf life is very long. ”
Because of Qian's mother's urging to hurry up and talk about the topic, Gao Jian only ate one piece of pizza, and Qian Xiaoxian ate two egg tarts.
Then, Gao Jian began to explain again, Qian Xiaoxian listened to it with relish, but Qian's mother was as boring as a book from heaven, and it was really cruel for her to listen to this.
Soon, she began to fall asleep.
Qian Xiaoxian had no choice but to bring a blanket and hit her, and Qian Mu woke up smartly and said, "Oh, why am I asleep!"
After saying that, she stood up and took the cup to make coffee, because she drank too much coffee, she kept going to the bathroom.