After the meeting, the students went back to class.
The students in class 15 ran back to the classroom quickly, and this morning was another math task. Hurry up to finish and strive to be the first!
Yun Hua summarized the knowledge points, and then released tasks and exercises.
Pei Zixuan took a look at those basic things, put them aside and went to sleep.
But as soon as he got down on the ground, someone patted him immediately: "Hey, second place, what's the meaning of this question?"
Pei Zixuan twitched the corner of his mouth, glanced at the title, and immediately frowned: "You pig, -x? and (-x)? are not the same thing, okay? They are the same thing, why do people want those brackets? Stuffed? Pig brains!"
Zhu Yiqun twitched the corner of his mouth, but in order not to be punished by the first place, he could only bite the bullet and nod: "Yes, yes, how do you know that I am a pig? Cough, can you explain it to me? Almost!"
Pei Zixuan was speechless: "Suppose x is 2, -x?=-4; (-x)? equals 4..."
"It's different, but..." Zhu Yiqun said.
Pei Zixuan glanced at him coolly, "Can you wait for me to finish?"
"Yes, yes, please!" Zhu Yiqun hurriedly lowered himself down.
Pei Zixuan was going crazy, he didn't understand such a simple thing, but he still patiently wrote on the paper: "Just now suppose that X is a positive number, now suppose that X is a negative number, such as x=-2. Then -x? is equal to- 4; and (-x)? is equal to 4! See what's different?"
Zhu Yiqun scratched his head: "I seem to understand..."
Pei Zixuan dropped his pen and got down on the ground.
But in less than a minute, he was poked awake again: "Then... what about the 3rd power, what about the 4th power, what about the 5th power..."
Pei Zixuan vomited blood!
…
In the afternoon is physics, and I just started learning physics in the second year of junior high school, so there is no need to review the first year of junior high school, just learn from the very beginning of the textbook!
Measuring this is relatively simple, just pay attention to the measurement unit and error. What is easy to confuse is the reference object in the mechanical movement.
It is easy for those who understand it to understand, but it is difficult for those who do not understand it to turn around. However, the reference object must be learned, because the reference object is too important in mechanical motion. In the future, all physical calculations related to mechanical motion will basically need to use the reference object.
For example, the distance between cars driving in the opposite direction and the opposite direction, as well as the relative speed, etc., all need to use reference objects. So this chapter must be understood!
After Han Fangzhou's explanation, he will use specific examples to explain what is a reference object...
After the first get out of class, Yun Hua explained to the class representatives that she was leaving early.
Pei Zixuan immediately yelled: "I have something to do, I have to go first!"
Damn it, he came to class 15 to sleep, but from morning to now, he hasn't slept for a minute!
Yun Hua glanced at him: "Don't worry, the second period is the discussion class, you have to answer other students' questions, this is the condition for you to come to class 15. After the second period, you can leave after the task is completed. "
Pei Zixuan: "..." Is it too late for him to leave class 15
For the group of pigs in class 15, he had to explain the simple question several times, and explain it clearly, otherwise he would not understand it at all!
If you don’t understand, you don’t understand. After being scolded so many times by him as a pig, you still don’t get angry, and you still lick your face and come up to him to continue asking that deadly simple question!
I'm bored to death!
Yun Hua patted Pei Zixuan on the shoulder with a smile: "Come on!"
She had to go home quickly, and told the editor that "A Dream in the Qing Palace" was on the shelves today, and she had to go home early to take care of some things!
Pei, who didn't run away, was instantly submerged in the sea of questions from Class 15 students~~~~
(end of this chapter)