Finally, Su Mu took advantage of the time to ask Yan Xiaoke to pour a glass of water for him, and quickly got up from the bed and put on his pants.

Su Mu is so mysterious.

Yan Xiaoke's eyes were always a little puzzled.

After she waited for Su Mu to get up, she deliberately went to turn over Su Mu's quilt, thinking that he was hiding something.

"Huh? You helped me clean up the room? ”

After getting dressed, Su Mu's mood slowly calmed down, and at this time he found that his room had been completely renewed.

"Otherwise, your room is so messy, who will help you clean it up but me." Yan Xiaoke raised his head proudly.

"You think everyone is as lazy as you are, and I guess you're going to be throwing things around again in two days!"

Su Mu touched his head.

Laughed and did not refute.

He does have a talent for littering.

The main reason is that Su Mu thinks that his room is so big anyway, and there are so many things that are commonly used, and it is too troublesome to tidy it up every day.

"Come, if there is anything you can't ask, just ask me!"

Su Mu sat down in front of the desk.

Yan Xiaoke also moved a stool and sat over.

Su Mu ate a grape.

Yan Xiaoke also ate a grape.

Su Mu ate another grape.

Yan Xiaoke also ate another grape.

"What are you doing with me?"

"What are you doing with me?"

"Yan Xiaoke..."

"Yan Xiaoke..."

"Su Mu is a handsome guy!"

"Su Mu.... Bah! ”

.......

After a little later play, Yan Xiaoke finally opened his teaching materials.

The known function f(x)=2x^3-ax^2+b

(1) Discuss the monotonicity of f(x).

(2) Is there a,b such that f(x) is -1 at minimum and 1 at maximum in the interval [0,1]? If it exists, find all the values of a, b, and if it doesn't, give the reason.

Su Mu glanced at it slightly.

I had a general idea in mind.

He asked, "The first question should be fine, right?" Just ask for a derivation and then discuss it by category. ”

Yan Xiaoke nodded: "Well, the first question is very simple, but I don't understand the second question a little, and I am a little confused when I read the answer." ”

Su Mu touched his chin.

To continue:

"The first thing that comes to mind for this kind of question must be the method of counterproof, you must first set up that A and B exist."

As he spoke, he picked up his pen and calculated the categorical monotonic interval of the function in the first question.

Then, immediately after that, the scope of the second question was drawn.

"If a≤0, f(0)=b, f(1)=2-a+b."

"At [0,1] single increase."

"At this time, when b=-1, a=0 satisfies the topic"

"This question is not difficult, it is just a classified discussion of the counter-evidence." Su Mu opened his mouth and said.

Yan Xiaoke: "Well, you go on, there are some twists in the back, mainly considering that the situation is a little unclear when 0

Su Mu nodded and wrote on the scratch paper: "f(a3)=-a^327+b, the maximum value is b or 2-a+b..."

If...

.......

"That's pretty much the answer, do you understand?"

"Nope."

Yan Xiaoke shook his head in confusion.

She struggled with the topic for more than half an hour.

Su Mu completely wrote it out in less than five minutes.

And I also wrote it to myself while explaining. Book 6 bar

For the first time, she began to doubt her intelligence.

"It's okay, let's do it again."

Su Mu didn't have any resistance, after all, when Yan Xiaoke gave him a lecture before, he never disliked him.

"Actually, this kind of topic is still very simple, and when you do more in the future, you will be very proficient, you are only a sophomore in high school now, and you still have a long time to practice." Su Mu opened his mouth and comforted.

Yan Xiaoke nodded stunnedly.

But I always felt that something was wrong.

What do you mean by being a sophomore in high school?

There is still a long time to contact??

You're only a sophomore in high school, right??!

There was a burst of complaints in my heart.

The two are once again caught in a struggle.

Su Mu's bedroom door slowly opened a small opening.

Seeing Yan Xiaoke and Su Mu getting along so peacefully, Su Mu's face finally showed a reassuring smile.

.......

Before you know it, the new semester is almost a month away.

The spring sports meeting is about to begin, and Qi Yunfan, as a member of the sports committee, has already started collecting registration information in the class in advance.

It stands to reason that except for the relay race, each person is limited to two reports, and each event is limited to two people.

But often in the whole class, only a very small number of students take the initiative to sign up, and Qi Yunfan needs to lobby one by one.

This year's Su Mu is much more confident than in the past, and with a wave of his hand, he directly reported a 100-meter dash and a 5,000-meter run.

Qi Yunfan and Yan Xiaoke were really surprised for a while.

Su Mu naturally has his own plans.

His current physical fitness has reached level four, and if he upgrades, he will need a full 10W points.

And this skill itself is very difficult to obtain points, if you don't pay attention to the sports meeting, who knows how to exercise until the year of the Su Mu monkey.

And reporting 100 meters and 5000 meters can also be regarded as a test of Su Mu.

There are more than 100 applicants, and the competition is great.

There are fewer people reporting 5000 meters, but the intensity of the exercise is more intense.

Su Mu wanted to test which way to get more physical fitness points.

And before the sports day.

There is one more important thing for students.

The first monthly exam of the new semester.

Here it comes.

.......

Wednesday, March 4th, cloudy and cold.

The first monthly exam in the spring of the second year of high school.

Walking side by side with Yan Xiaoke, Su Mu felt an indescribable sense of pride.

"Tut-tut, when I walked in the direction of the first examination room, my mentality was a little different."

"Yan Xiaoke, this is the first time we have gone to the same examination room since our two high schools, right?"

This time, the monthly exam was scheduled for Wednesday and Thursday of the fourth week.

Definitely very good news for the fifth class of high school on Friday.

As before, Su Mu only brought a pen.

Then followed Yan Xiaoke to the reading room.

In every large-scale exam, the first three examination rooms with the best results are set in the reading room.

From the fourth examination room, it is arranged in the order of first class and second class.

For example, the last time Su Mu's examination room was the seventeenth examination room, he took the exam in the classroom of the twenty-fourth class of high school.

The reading room is also known as the library.

Students can borrow books here with their student ID.

But what's funnier is that in Qianbei Middle School, the reading room is above the school conference building.

Because the students are usually busy with classes, it is basically impossible for students to come here, and it is just a decoration.

At least for Su Mu.

It was the first time he had entered the so-called reading room since high school.

"Ding, you have entered the first-level library, and all the points you earn from studying have increased by 20%"

......