Chapter 3: "Deputy monitor" topic

Xiao Xiaoming stayed up late yesterday to read a novel. In the early hours of the morning, he did something indescribable and wasted his physical strength. In addition, he didn't have breakfast in the morning.
"Xiao Ming, what are you going to do!" Teacher Fang was startled.
I just resuscitated after a sudden death. Xiao Ming only felt dizzy and fell to the ground for a few more steps. He approached Teacher Fang step by step, put his hand on Teacher Fang's shoulder, panting heavily.
"Damn body, can't play at all!" Xiao Ming whispered.
Xiao Xiaoming's performance surprised students again.
"What is Xiao Ming doing?"
"He ... he approached Teacher Fang!"
"Wow, Xiao Ming is only twenty centimeters away from Mr. Fang! What is he doing! It will not be interesting for the other teacher!"
"Snoring?"
"Don't be kidding, Teacher Fang is fifty-nine this year and will retire next year!"
"Xiao ... Xiao Ming, what are you doing!" Teacher Fang was frightened by Xiao Ming's pale face.
"Speak." Xiao Ming's voice came out of his throat.
"This kid is sleepwalking! He goes up to the problem? Math problems?"
"The kid who just happened to be in the same biology class just didn't think he would have this function problem, right? Is he crazy?"
Zheng Xuanyu, who has been smiling all the time, frowned slightly. What she did not like the most was the students who disrupted class discipline.
Xiao Xiaoming ignored the eyes of the crowd and pulled the chalk in Teacher Fang's hand to the blackboard.
调整 He adjusted his breath, while writing on the blackboard, and said, "This question involves knowledge of derivatives and quadratic functions. To solve this kind of problem requires mastering the classification idea, first we need to derive."
Xiao Ming wrote the derivative of f (x) on the blackboard.
Derivation is the simplest and most basic step of a function problem. Xiao Ming, a student of slag, can write it, which is not beyond the expectations of the students.
This step, Xiao Ming did not get a surprise value.
Teacher Fang Fang was originally going to drive Xiao Ming down, but it is rare to see Xiao Ming, who is usually silent and only take 34 points for mathematics, to take the initiative. Teacher Fang still has the patience to let Xiao Ming continue.
"We next set δ = a ^ 2-4 to less than or equal to 0, that is, when -2 is less than or equal to a and less than or equal to 2, g (x) has no real root at (0, + infinity) ..."
Xiao Xiaoming wrote in detail on the blackboard, explaining it step by step.
Zheng Xuanyu's eyebrows opened. Xiao Ming's blackboard typeface is as beautiful as the biology class just now. The main reason is that his topic is clear and detailed, not as a mess.
Zheng Xuanyu, as a learning committee member in the class, welcomed and appreciated as long as she studied hard, whether she was good or bad.
Teacher Fang Fang looked at Xiao Ming's problem-solving steps and nodded, completely correct! More detailed than the reference answer.
Xiao Ming said: "So when a is less than or equal to 2, f (x) monotonically decreases at (0, + infinity); when a is greater than or equal to 2, f (x) monotonically increases on XXX and monotonically decreases on XXX . "
Xiao Ming successfully finished the first question of this question. Although it is not too difficult, at the level of three middle schools and three classes, two thirds of the class will not do it.
The students who were willing to attend the lecture listened intently, wrote the steps on their own papers, and the students who were unwilling to give up the last major subject, looked at Xiao Ming in amazement.
Xiao Ming, the most stable "deputy monitor" in the class, actually talked about the last big question in the monthly exam on the podium!
The math multiple-choice question will only be "three short and one short, and the shortest three short and one long." Xiao Ming was actually explaining the last big question.
Xue Xuezhao looked dizzy, not to mention directly answer without taking the answer, even if they read the answer and read it, they could not read some formulas.
"Wacha! Xiao Ming, is this medicine?"
"What's going on with this boy today, biology class is expressing itself, math class is also expressing itself, and it looks like everything!"
"Xiao Ming slept all morning, and the whole person changed after waking up!"
"Xiao Ming has a bad face these days, like a severe lack of sleep. It won't be the kid's transformation. Go home and stay up all night to read and study!"
"Impossible! I understand that this boy has no other hobbies other than sleeping and reading novels. Besides, he hasn't heard a class in the first two and a half years in high school, and now says that he is totally evil in just a few days Make up two and a half years of knowledge? Impossible! "
Studies are shocked!
"Surprising value from Chen Lin +10."
"Surprise value from Li Min +2."
Uh ...
"Shock value from Luo Mingyu +1."
"Shock value from Zheng Xuanyu +10!"
Xiao Ming found one thing. In addition to the surprise value, the students were shocked. The shock value will be converted into a surprise value according to a certain ratio (1: 2) and absorbed by the game system in their minds. In other words, it is better to shock everyone than to surprise everyone!
After this wave, Xiao Ming harvested 90 points of surprise value, and now has a total of 172 points of surprise value.
What makes Xiao Ming happiest is that in the past, the most admired goddess in the body, Zheng Xuanyu actually contributed 10 points of shock! Explain that this girl is really good, no matter you are good or bad, as long as you are good enough, she will give you a thumbs up.
172 surprise value, almost a wooden treasure chest can be opened. But Xiao Ming is still talking about the topic, he needs to finish talking.
A bigger wave of surprise value is still behind! Xiao Ming wants to explain the second question of this question. This class is only Zheng Xuanyu doing it alone ~ EbookFREE.me ~ This question, even if I tell you the answer and process, you do n’t digest it well, again Let you answer, you will not!
Zheng Xuanyu completely put down her pen and focused on Xiao Ming's topic. There are many ways to think about this question. Zheng Xuanyu has to see if Xiao Ming's thinking is the same as himself.
Xiao Xiaoming was a bit tired. His weak body made him burden the lecture, and the lecture was really a physical task.
However, in order to make surprise a little more, Xiao Ming relies on idea support.
It seems that after the experience of the unreal Pan Shaxing technology warrior, his willpower is much stronger.
"Next I will explain the second question to you, and prove this inequality ..."
Xiao Ming's thoughts remained clear, explaining in detail each step of the second question.
Teacher Fang nodded again and again! Xiao Ming's idea of ​​solving the problem is a little more clever than the reference answer, but it is easier to understand.
Refer to the solution method of the answer, you can understand the good grades, the students with intermediate grades are basically confused, and Xiao Ming's solution can be understood by most people in the class.
Zheng Xuanyu nodded again and again, and was slightly agitated in his heart. Xueba was excited when he saw the clever way of solving the problem. Xiao Ming's solution was actually the most clever and easiest to understand!
Zhu Haolun, a boy sitting next to Zheng Xuanyu, looked at Xiao Ming inconceivably. Zhu Haolun was the second in the class. He had always been trying to catch up with Zheng Xuanyu. The second question he asked did not do it.
Zhu Haolun couldn't believe that Xiao Ming was able to solve the problem in a different way from the reference answer.
For more than twenty minutes, Xiao Ming eloquently explained. When the last word fell, the classroom burst into warm applause!