Xueba school grass is cut from white to black

Chapter 185 What to do if you lose

What Huo Lan backtracked was the question with the most steps to answer among the six questions, a total of three questions.

Fortunately, the difficulty is not great. The main study is the derivative, and the comprehensive study of the tangent equation, extreme value and constructor method.

The young man thought for a while, took the chalk and began to write the steps, and after a while he wrote a large piece of it eloquently.

What Fang He drew was the calculation problem of Taylor's formula. His eyes lit up, he took the chalk and started to write the calculation process frantically. After calculating the final result, he threw the chalk to the podium, approached Sang Yu curiously and said:
"Sang Yu, what are you writing... tangents and zeros? This is too simple."

Fang He stood aside, seeing that Sang Yu was writing slowly, and was in a hurry:

"You're writing too slowly, how about I help you write, don't finish it when the time is up."

Sang Yu hesitated for a while, then said with a tactful smile:
"Forget it, I'll write it myself, it doesn't matter if I can't finish it."

"Why doesn't it matter?! This is for team points. If you haven't finished writing, our team will score less points, and maybe lose!"

Fang He pushed her aside as he spoke:
"Let me write. I write faster, so I can see if there are any problems."

After Jun Zhimiao calculated the result of the fixed points, he turned to look at Han Man.Finding that Han Man only wrote the first steps, and didn't move anything behind, he couldn't help frowning.

"Why did you only write so much? I remember that you were a middle-level Luoer before?"

Han Man laughed straight:

"I used to know it, but now I have forgotten it."

Jun Zhimiao glanced at her speechlessly, and pointed out the conditions of the proof:

"The problem now is to prove f'(x)=kf(x). We have only learned how to prove f'(x)=0. It means that this problem is about making a constructor. You should move this over here first."

Counseling Ding stood by, and Yoyo reminded: "There are 4 minutes left."

Seeing Han Man looking at her in confusion, Jun Zhimiao simply took the chalk:
"Arranging it into the form of f'(x)-kf(x)=0, you can see that this is in line with what we have learned. There are two functions on the left, indicating that this is a compound form. Use the method of integration by parts to deduce..."

She wrote while speaking, and pointed to the previous condition of f(a)f(b)>0:
"Isn't this the zero-point theorem, just analyze it in sections."

The students in class 2 were still chatting about pouring water at the beginning, but then they gradually lost their voices.

After reading all the steps written by Jun Zhimiao, I couldn't help applauding:

"Did Jun Zhimiao sleep when the high math teacher was talking about the median value of Rolle?"

"It seems to be, in the middle of last semester."

"King Zhimiao last semester, you forgot 98 in high math? There was a wrong sign, two points were deducted, and he was scolded by the high math teacher. It seems to be a headache for Mr. Gao!"

"Woooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo L L L Lt!!"

After the girl finished writing the result, she went back and quickly scanned Han Man's previous process, pointing to the first theorem proof and said with a smile:
"It's fine if you can't calculate, and you haven't memorized the steps. The physical education teacher taught you how to write the steps in the middle value of Luo Er?"

Jun Zhimiao directly wiped off the steps on the blackboard with his hand, and re-wrote:

"The opening and closing are completely wrong. The median value of Rolle is a closed interval and a continuous open interval can be guided? I ask you to go back and copy the three median values ​​a hundred times."

Class 2 suddenly burst into laughter, and some students joked:

"I think Jun Zhimiao should be the study committee member! Manman can be the mascot!"

"I can jio."

"One minute left."

Sang Yu stood aside and watched Fang He write the steps. The more he read, the more he felt that something was wrong. He pointed to the calculation results of his latest steps:

"This number is definitely not right."

After Fang He finished writing the last step, he looked at the place she was pointing at and asked, "What's the problem?"

Sang Yu bit her lip: "This is an exponential function. To find the derivative, you need to construct a logarithmic function, or find the tangent equation of the (0, 0) point...you are missing a negative sign."

She stretched out her finger, Fang He reacted, and hurriedly began to add:
"Grass, there is a mistake here, and the second small question will also affect it."

The first question is easy to change, but the g(x) of the second question is a composite function, and it is difficult to find the derivative, so now we have to recalculate.

The two hurriedly wiped the blackboard. Huo Lansu just finished supplementing the picture of his last quiz, and came over after checking the results.

"what happened?"

"Miscalculated."

The young man glanced at the entire amount of calculations, and said with a light smile, "It's a waste of points."

"One minute left."

Fang He asked for guidance again, and his hands trembled when he heard the counselor's words.

Sang Yu's face was pale, seeing that Jun Zhimiao had already finished writing the steps for Han Man's topic.

"Let me do it."

Huo Lansu picked up the chalk to fill in the result of derivation, Fang He was taken aback, and moved away unconsciously.

The young man wrote the question without changing his face, and after the quick derivation, he began to list all the zero-point situations in the interval.

"It's time, stop writing."

There is still a zero to write.

Huo Lansu put down the chalk regretfully.Seeing Jun Zhimiao standing on the other side, he winked at him triumphantly:

"God Huo, what do you do if you lose?"

Huo Lan smiled lowly, his black eyes were full of tenderness: "You can do whatever you say."

"Showing affection in public is strictly prohibited!"

Director Ding's big palm fell directly on Huo Lansu's back, and the young man let out a muffled snort. Seeing that Director Ding smiled, he said:

"You guys haven't finished writing in 10 minutes, is it so difficult?"

Sang Yu stood aside, tears were about to fall.

Director Ding went over to Huo Lansu after reading Sang Yu's problem.

The whole steps of Huo Lansu's big questions are clear and tidy, and the last small question is accompanied by a graph for understanding.

"Strong, Huo Lansu."

There was a sound of admiration from the audience, Director Ding walked up to Fang He's topic, and clicked:
"It's a pity, I'm not strong enough, and your group is holding you back."

Fang He was full of confidence and felt that he would definitely get a perfect score.He was stunned for a while when he heard Counselor Ding's words.

Counselor Ding turned around and pointed to the middle steps of the calculation problem:

"I don't check it after I finish writing, but I go to help others with the questions. Fang He, how did you get this habit?"

A group of people looked at Fang He's solution steps in unison. Han Man pulled Jun Zhimiao's clothes and whispered:
"The one on the first line is the formula he listed. I substituted the intermediate steps that Counselor Ding pointed out. There is nothing wrong with it."

Jun Zhimiao tilted her head and whispered in her ear:
"...The formula was skipped."

Coach Ding finished counting the scores, turned around and wrote on the scoreboard of class one:

"Each big question is 10 points, Huo Lansu 10 points, Sang Yu 8 points, Fang He 0 points, a total of 18 points. I hope you will reflect on yourself."

The atmosphere in Class 1 was silent, as if Coach Ding was not criticizing the three people on stage, but the entire class.Even the students from Class 2 who were sitting on the side did not dare to make a sound.

Jun Zhimiao stared at the three questions on the blackboard, and frowned after finding something wrong:

"...Why did the squad leader miss a step?"

Geng Moqiao groaned, Director Ding had already walked up to his subject, and pointed casually:

"If the steps are not written in full, two points will be deducted."

Geng Moqiao hadn't reacted yet, so he didn't understand, so he asked, "Where is the leak?"

The two looked at him silently.

Han Man's face was full of hatred: "Squad leader, I didn't say you. Miao Miao said it before, and the numerator must be zero. Why did you just use L'Opidus and didn't explain it earlier?"

Geng Moqiao looked at it for a long time, with a shocked expression on his face: "This needs to be explained?!"

"..."

Han Man patted Jun Zhimiao on the shoulder, and said righteously:

"I think that if I want to copy the three median theorems a hundred times, the class leader should also do a thousand proof questions to consolidate the standard of the proof questions."

　Procrastinating and procrastinating and posting at night
　　
　
(End of this chapter)