Word.

This fat man is also a man of action.

In order to save Lin Bei, he didn't even do his favorite chicken leg in his hand, and went straight to a teaching building.

For the sake of his brother, he is absolutely serious, it is not enough to go up the knife mountain and down the sea of fire, but it is still okay to stick a knife in both ribs.

At the same time.

The other side.

Lin Bei went straight back to his classroom seat.

However, after he sat down, he did not immediately pamper his physics book, but picked up a math paper.

Without much hesitation, I went straight to work.

Don't ask why.

Ask.

That is, this is the homework assigned by the math teacher Yu Huatian (Hell Field), which should be done or done, just to test his true strength.

Although by rank.

He is just starting out in mathematics, and he can score more than 120 points in general exams.

However, theory belongs to theory, and practice belongs to practice.

Because the difficulty level of different test papers is different, there are no very strict standards.

If the paper is easy, the new top student can also get a full score of 150 like the top students.

But if the paper is super difficult, the top students may be able to approach a full score, but the first students will not be able to say 120 points, maybe 100 and below 100 are possible.

After all, even if you are familiar with the knowledge points.

But familiar is familiar, but when doing the questions, it is completely different.

If it's a language, a foreign language is a little better.

But in this mathematics, even if the knowledge points are the same, there are 10,000 ways for the questioner to dig a hole in the problem.

If you don't pay attention, it's a cool rhythm.

If you don't do enough questions, you don't have a battle-hardened routine, and you become an elite soldier in a hundred battles.

The so-called top students may take the exam 140 today, 120 tomorrow, and only 99 the day after tomorrow.

And this time the math papers.

Lin Bei swept it a little, and knew that it was not too difficult, it was all basic questions, and the students' foundation was considered.

And what Lin Bei is best at is the foundation.

After all, he memorized all the content of the mathematics books backwards, and the theoretical foundation can be described as a solid batch.

If it's too complicated and profound, maybe he won't know it, but even if he will, he will have to think about it for a long time.

But are these basic questions difficult for him?

With his ability to draw inferences.

It's just three fingers to pick up snails, catch crabs in the bamboo strips, and pinch them with your hands, and you can get nine out of ten!

So, he did it quickly.

Normally, the exam takes two hours, and he did it in less than an hour to get the last question.

Just like Xing Ye beating the eighteen palms of the dragon, it can be said to be done in one go, fast to the extreme, and handsome to fly.

As for the last question.

[The known function f(x)=l.]

x+ax+2 (a belongs to R). 】

[1): Discuss the monotonic interval of f(x). 】

[2): If g(x)=e^x-x^2 and when x belongs to (0,+∞), f(x)≤g(x) is constant, find the maximum value of a. 】

This question.

If it was Lin Bei in the past, it would definitely not.

But now in Lin Bei, isn't it a piece of cake to catch fish in the basin and tigers to eat grasshoppers?

I won't say much about the first question.

Eat three peanuts...... Ahem, I've read some books and learned the knowledge point.

Let's go straight to the second question, find the maximum value of a.

Again, that's the same sentence.

This paper is really simple, it is to test the foundation of students, including this finale question.

Even the second question of this finale can be easily made as long as the student has a solid foundation.

Even he has more than one solution, two or three bases, such as critical tangent and tangent deflation.

But Lin Bei didn't use these.

He used an easier approach.

That's the heterogeneous method.

Everyone knows the heterogeneous method!

After all, as we all know, the three musketeers who solve the derivative finale problem are isomorphism, isomerism and deflation.

Saw......

[Solution: Because e^x-x^2-l.]

x-ax-2≥0, which is constant for 0>0, so x=1 is also true. 】

[And bring in x=1, then e-1-0-a-2≥0, then a≤e-3, which is necessary to explore the path.] 】

[Re-validating adequacy.] 】

[When A≤E-3, substitute the above formula.] 】

[You can first simply reduce the formula to several non-negative numbers, i.e., e^x-x^2-l.]

x-ax-2=（x-l

x-1）+(e-3-a)x+e^x-x^2-(e-2)x-1。 】

[Because of x-l.]

x-1≥0。 】

【(e-3-a)x≥0。 】

【e^x-x^2-(e-2)x-1≥0。 】

[Therefore, the above scaling formula ≥ 0, and if and only if a=e-3, x=1 obtain the equals sign.] 】

[Therefore, the maximum value of a is e-3.] 】

That's right, that's the end of the second question.

Simple, too simple.

Just learn heterogeneous and memorize some common scaling formulas, and it's really easy.

In addition to the foundation, the rest is still the foundation.

Less than three minutes.

Lin Bei did it perfectly, not to mention.

On the contrary, he felt very bad and really wanted to do it again...... One hundred and eighty sets of rolls can be satisfied.

However, he stiffly restrained himself.

It's been a long time, so there's no hurry.

"Wow, papapa, call it a day!"

As if there was a classic dialogue reappearing, Lin Bei also stopped answering the question and put away the colorful eternal pen.

"Ding, math up to 1%."

Lin Bei: "......"

"After completing a math paper, this math level has only increased by 1 point, which is far less than the previous speed?"

"It seems that the follow-up improvement will indeed become more and more difficult."

"It's not a hundred similar papers that can make me elevate to the level of a god, not even 11 thousand."

"Instead, I need more effective questions that can help me fill in the gaps, otherwise the upgrade will be very slow."

"It's a pity ......"

"I didn't have time to ask Zhao Qinghan for a notebook and a mistake book in the morning, otherwise I could have shortened a lot of time......"

Inexplicably, Lin Bei thought of Zhao Qinghan.

But the next second.

He shook his head and didn't bother with it anymore.

The notebook and the wrong question book are not in a hurry for the time being, and it is not too late for him to brush all subjects to level 7 first, and then go to Zhao Qinghan.

So......

He figured out the physics Xiao Kenai again, and was ready to continue to pamper the physics book, and strive to improve it at noon, after all, he had to pity the three subjects of external metaplasia in the afternoon and evening.

Fortunately, he has a green dragon, and his physique is far beyond ordinary people, otherwise he will not be able to hold on to the high load of the whole day.

And his time is also very tight.

Twenty-four hours a day.

He wanted to break it into forty-eight hours.

However, that's not realistic.

Only by honestly using every minute and every second to read books hard and strive to maximize the use.

But at this moment.

But a soft, sweet and glutinous female voice suddenly sounded in her ears: "Hey, Lin Bei, didn't you rest at noon?" ”

Hear the words.

As soon as Lin Beiwei raised his head, he saw a very cute and cute figure walking towards him.

Zeng Xi, class middle school committee.

is also the first student in the class, usually a person who eats with reading books as a topic, and people give the nickname of the light of class 4, which is diametrically opposed to the shame of Lin Bei's class 4.

Not only that, Zeng Xi is also a class flower.

Tall one meter in his early sixties, his face is slightly round, but not fat, on the contrary, he is very sweet and cute, full of Lori, everyone who sees it, wants to reach out and pinch it.

If it weren't for the fact that there is also a school goddess Zhao Qinghan, who is too perfect in appearance and too strong, and sits firmly in the first place of the school flower.

In fact, Zeng Xi can also be said to be the school flower.

But regardless of the class flower or the school flower, Zeng Xi rarely talked to Lin Bei in the past.

After all, the two are in the same world, although they are in the same class, they are not in the same world at all!

But today.

Zeng Xi actually took the initiative to talk?

This is the eleventh book, and it's incredible!

In my memory, the last time Lin Bei (original) talked to Zeng Xi, it seems that I don't know how long it has been, right?

As a school committee, Zeng Xi has the responsibility to help the students in the class improve their grades, such as Lin Bei.

But in the past, Lin Bei couldn't support the wall with mud, and used other people's kindness as fish lungs, and directly ran away from popularity?