Reborn Xueba, you don't really think that studying is difficult, do you?

do as promised.

This Fatty Wang is also a man of action.

In order to save Lin Bei, he even gave up his favorite chicken leg, and went straight to a certain teaching building.

For the sake of his brother, he is absolutely serious. It is not impossible to go up the mountain of swords and go down into the sea of ​​flames, but it is still possible to use a knife in both sides.

At the same time.

the other side.

Lin Bei went straight back to his seat in the classroom.

However, after he sat down, he didn't spoil his physics book immediately, but picked up a math paper.

Without much hesitation, he started working directly.

Don't ask why.

ask.

That is, this is the after-school homework assigned by the math teacher Yu Huatian (Jijitian), which should be done or should be done, just to test one's true strength.

Although divided according to grade.

He is just a beginner in mathematics, and he can get about 120 points in general exams.

But theory belongs to theory, and practice belongs to practice.

Because the difficulty level of different test papers is not the same, so there is no very strict standard.

If the papers are easy, beginners can get a full score of 150 just like top students.

But if the papers are extremely difficult, the top students may still be able to get close to the full score, but the beginners may not be able to score 120 points, maybe 100 or below 100 is possible.

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

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

It would be better if it is a foreign language.

But in this mathematics, even if the knowledge points are the same, the person who wrote the question has ten thousand ways to dig holes in the question.

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

If you don't do enough questions, don't have a long battle experience, and have the routines in mind, then you will become an elite soldier.

The so-called academic master may get 140 in the test today, 120 in the test tomorrow, and only 99 in the test the day after tomorrow.

And this time the math paper.

After Lin Bei scanned the questions for a while, he knew that the questions were not too difficult, they were all basic questions, and the students' basics were considered.

And what Lin Bei is best at is the basics.

After all, he has memorized all the contents of mathematics books backwards, and his theoretical foundation can be described as a solid group.

Maybe he doesn't know how to solve too complicated and advanced questions, and even if he does, he will have to think hard for a long time.

But are these basic questions difficult for him?

Relying on his skill of drawing inferences about other cases from one instance.

Just pick up snails with three fingers, catch crabs in bamboo strips, pinch them with your own hands, and you will be sure!

So, he did it very quickly.

The normal exam takes two hours, and he did the last question in less than an hour.

Just like Master Xing hitting the Eighteen Palms of Subduing the Dragon, it can be said to be done in one go, extremely fast, and so handsome that he flies up.

As for the last question.

[Known function f(x)=lnx+ax+2 (a belongs to R). 】

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

【2): If g(x)=e^xx^2 and when x belongs to (0, +∞), f(x)≤g(x) always holds true, find the maximum value of a. 】

This question.

If Lin Bei used to be, he definitely wouldn't.

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

I won't say much about the first question.

Anyone who eats three peanuts... ahem, has read some books, and has learned the knowledge points will know it.

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

Again.

This paper is really simple, it is testing the foundation of the students, including this final question.

Even the second question of this final question can be easily answered as long as students have a solid foundation.

Even he has more than one solution, but two or three kinds of solutions, such as critical tangency and tangent scaling.

But Lin Bei didn't use these.

He used a simpler method.

That is isomerism.

Everyone knows isomerism!
After all, as we all know, the three swordsmen who solve the finale of the derivative are isomorphism, heterogeneity and scaling.

only see...

【解：因为e^x-x^2-lnx-ax-2≥0，对0＞0恒成立，所以x=1时也成立。】

【而带入x=1，则e-1-0-a-2≥0，则a≤e-3，这是必要性探路符合。】

[Re-verify the adequacy. 】

[When a≤e-3, substitute into the above formula. 】

【可以先将式子简单放缩成若干个非负数，即e^x-x^2-lnx-ax-2=（x-lnx-1）+(e-3-a)x+e^x-x^2-(e-2)x-1。】

[Because x-lnx-1≥0. 】

[(e-3-a)x≥0. 】

【e^xx^2-(e-2)x-1≥0. 】

[So the above scaling formula ≥ 0, if and only when a=e-3, x=1, the equal sign is obtained. 】

[So the maximum value of a is e-3. 】

You read that right, that's all for the second question.

Simple, too simple.

Just learn heterogeneity and remember some common scaling formulas, this question is really very simple.

Apart from the basics, the rest is the basics.

Less than 3 minutes.

Lin Bei got it done perfectly.

On the contrary, he felt very unsatisfactory, and really wanted to do another...one hundred and eighty sets of papers to be satisfied.

However, he restrained himself abruptly.

As time goes by, don't worry.

"Wow, bang bang, call it a day!"

As if the classic dialogue reappeared, Lin Bei also stopped answering the questions at the same time, and put away the colorful eternal pen.

"Ding, math has increased to 1%."

Lin Bei: "..."

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

"It seems that subsequent promotion will indeed become more and more difficult."

"It doesn't take a hundred similar papers to make me a god of learning, or even [-]."

"It needs more effective questions, which can help me check for omissions and fill in the gaps, otherwise the upgrade will be extremely slow."

"Unfortunately……"

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

Inexplicably, Lin Bei thought of Zhao Qinghan.

But next second.

He shook his head and stopped worrying about it.

Don't worry about the notebook and the wrong test book for now, it won't be too late to go to Zhao Qinghan after he has brushed up all subjects to level 7 first.

and so……

He found out the little physics book again, and was going to continue to pamper the physics book, and strive to upgrade it at noon, after all, he still had to take pity on the third subject of external metaplasia and biology in the afternoon and evening.

Fortunately, he has a green dragon, and his physique is far superior to ordinary people, otherwise he might not be able to sustain the high load all day long.

And his time is also very tight.

24 hours a day.

He can't wait to break it into 48 hours.

However, that's not realistic.

The only way is to honestly use every minute and every second to study hard and strive to maximize the use.

But right now.

Suddenly, a soft, sweet and glutinous female voice sounded in my ears: "Hey, Lin Bei, didn't you take a break at noon?"

heard.

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

Zeng Xi, class committee member.

He is also the number one student bully in the class, and he usually eats reading books as homework. He is nicknamed "The Light of Class 4", which is the complete opposite of the shame of Lin Bei's class 4.

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

He is just over 1.6 meters tall and has a slightly round face, but he is not fat. On the contrary, he is very sweet and cute, full of lolita.

If it wasn't for the fact that the school still had a school goddess, Zhao Qinghan, who was firmly seated at the top of the school belle because of her perfect looks and too strong strength.

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

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

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

But today.

Zeng Xi actually took the initiative to strike up a conversation?
This is really the No.11 book, incredible!
In my memory, the last time Lin Bei (original body) spoke to Zeng Xi seemed to be a long time ago, right?

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

But in the past, Lin Bei was so muddy that he couldn't support the wall. He used other people's kindness as a fish lung, and just ran away with his popularity?