Super Xueba: Start With A Low Control Score!

Chapter 245 The love curve problem is solved!

“All right!”

“It’s been so long, so five simple questions, surely everyone has the answer, right?”

“Now I’m looking for five people to come up and do it. If you like, you can raise your hand and declare in advance that it’s not in vain!”

“As long as you dare to come up and do it right.”

“Then there will be no homework after class today. If you can do more than three correct questions, then go straight to rest.”

“certainly!”

“The premise is that the process can be optimal!”

“…”

During the time when everyone was thinking, Jiang Nan stood on the podium without speaking. Seeing that everyone was thinking about it, he spoke slowly and meaningfully.

And when he opened his mouth, it was Wang Zhan.

Huh!

Huh!

Huh!

At first, everyone was eager to try, but now they heard Jiang Nan’s words, they are even more gearing up.

“Teacher Nanshen, are you serious about this?”

Many people have their eyes bright and can’t wait.

after all……

For students, is there anything more exciting than not doing homework and taking a break before get out of class?

Regardless of whether they can make it or not, this reward sounds tempting anyway, and there are endless noises.

“really!”

Jiang Nan nodded: “As long as your answer is correct and the process reaches the optimal solution, you can rest whatever you want.”

“Will the head teacher agree?”

“Old class is here, you just ask!”

Wow!

Many people have set their sights on Hu Yifei.

Hu Yifei: “%￥#@#￥%……”

All right!

I have been a transparent person for a long time, and you don’t care. Now that I think of my old lady, I really don’t want to be a student at all.

Hu Yifei murmured inwardly, but on the surface she didn’t show her composure. “The teacher in this class is Jiang Nan. As long as you can meet his requirements, I naturally have no opinion!”

“…”

“Well, I’ll come!”

“Teacher Nanshen, choose me, I will do the first question!”

“Teacher Nanshen, choose me and I will do the second question!”

“I, I, I will do the third question!”

“You can’t do it, let me do it! I have covered all the first three questions, and I am the representative of the math class!”

“What if you are a math class representative? It’s really like comparing it to others. It’s up to me to do it!”

“Since you have chosen the first three questions, I will choose the fourth question, although I don’t know if I can do it right!”

“And I am Huang Sihai, I will choose the fifth question!”

“Fuck, Huang Sihai, you also raise your hand? Really, just the little thing in your stomach, can you make the fifth question?”

“Oh, what about the goods in my stomach? Although I can’t make it out, the words of Nanshen teacher made me understand that mathematics is not a scourge. I have to dare to try, dare to challenge, and step on it one day sooner or later …”

“…”

Only for a moment.

All the children’s shoes in the class raised their hands, even including Huang Sihai and Hu Dajun.

See this scene.

Hu Yifei was stunned again.

“Who am I? Where am I? What am I doing? Are these people who raised their hands still the idiot students I taught?”

Hu Yifei really doubted life at this moment.

Just because…

She has taught class 304 for nearly three years and has never seen students answering questions so positively, let alone on the stage.

Before that.

She has always been only the top five in the class when she has a problem, at most the top ten in the class will raise their hands to answer.

As for the other thirty or forty people…

That’s as low as you can bury your head, for fear of being noticed and named by her.

But when it comes to Jiang Nan’s class, the opposite is true.

Even Huang Sihai and Hu Dajun dared to raise their hands on the podium, right?

In other words…

In order to encourage students to take the initiative to speak and answer questions.

She didn’t have any less incentives in the past!

That verbal reward is even more of a big piece.

But these people underneath are like idiots, and few answer her questions.

Really…

Without comparison, there is no harm.

finally!

Because there are too many people raising their hands.

Jiang Nan randomly selected a few, Qin Yumo, Su Yu, Zhang Hao and Li Qianqian, plus another Huang Sihai.

As for the others.

You can only do it on your seat.

certainly!

Even if you can’t go to the podium, but can only be in the seat, the reward can still be enjoyed.

As long as the answers and processes written by everyone are faster and more accurate than those on the podium, and if Jiang Nan is satisfied, then homework can be avoided, and you can even take a break from get out of class.

Just like Bai Yingying.

While Qin Yumo and others took the stage one after another.

She immediately wrote the answers to the five questions and the process of solving them, and handed them to Jiang Nan.

To this.

Jiang Nan nodded and affirmed.

have to say……

Bai Yingying has made great progress, and it is not wasted that he has worked hard before, and even given Intellect Skittles.

Although the above five questions are not difficult, they are just a bit novel and strange, but with Bai Yingying’s past strength, it is still difficult to do all of them correctly and barely give the optimal solution.

But now…

Bai Yingying managed to do it.

And then immediately.

Fatty Wang also handed in answers to five questions.

But after Jiang Nan watched it, although he nodded, he shook his head again, giving Fatty Wang a disgusting look.

This fat man is definitely lazy.

Although the answer was correct and the problem-solving process was correct, it was too tedious, even Bai Yingying’s could not be compared, let alone the best, it was really a waste of his after-school tutoring.

Um!

Another intellectual skittle has also been scrapped.

In comparison.

Bai Yingying is much smarter.

This is something later, let alone talk about it for the time being.

On the other side, the few people on the podium also occupy the corner of a blackboard, doing quick questions.

Among them, Qin Yumo did all five questions, Su Yu and Zhang Hao both chose only three questions, and Li Qianqian only chose two questions.

As for Huang Sihai, he scratched his head for a while, looked east, and looked west. Although he mustered up the courage to come up, it is still impossible for him to do it.

but……

At least the first step has been taken, and the courage is commendable.

Jiang Nan gave him an encouraging look.

To this.

Huang Sihai smiled directly and cocked his mouth.

Originally, he was still a little bit nervous after he came up, after all, he has almost never answered a question in front of everyone.

But now with Jiang Nan’s encouragement, his anxiety disappeared, leaving only boundless firmness.

He swears…

Starting today, we must work hard, work hard, and work hard, otherwise I am sorry for Nanshen’s encouragement.

soon!

The people underneath are done.

But Jiang Nan didn’t bother to collect them one by one, so he confessed to the classroom assistant Hu Yifei to accept them and asked him to correct the answers later.

Anyway!

He believed in his words.

As long as these people can do the right thing and reach the optimal solution, let alone no homework and early breaks, it doesn’t matter if the math classes are changed to self-study classes in the future.

but……

That possibility is quite low.

After all, even Bai Yingying’s problem-solving process was not optimal, and others estimated that it was even worse.

At the same time.

The few people on the podium also finished.

The answer is as follows…

The first question: love curve question.

Problem solving process…

Closed by graphics, the conclusion involves the distance from the point on the curve to the origin, which is associated with the polar coordinate equation, and the polar coordinate system is established with the origin as the pole…

Then C: p^2=1+p^2|cos0|sin0.

That is, p^2=1/(1-|cos0|sin0°).

Because |cos0|sin0≤1/2|sin20|≤1/2.

So p^2≤2, that is, ρ≤√2.

Therefore, the serial number 2 is correct.

…

From p≤√2.

Knowing that x=pcos0≤√2, y=psinθ≤√2, after inspection, there are 6 integral points that satisfy the condition, so the serial number 1 is correct.

…

The polar coordinate equation of curve C in the first quadrant is p1^2=1+p1^2cos01sin01.

The polar coordinate equation of curve C in the fourth quadrant is p4^2=1+p4^2cos04sin04.

Another θ4=－θ1.

but……

…

According to the above conditions.

A symmetrical diagram of the polar diameter about the polar axis can be made.

The figure shows.

The area of ​​the “heart-shaped” area in the right half is larger than the area of ​​half a unit circle, so the area S of the “heart-shaped” area is greater than 2*(1/2π)*1^2=π is greater than 3, so the serial number 3 is wrong.

…

In summary.

The answer is C, and the numbers 1 and 2 are correct.

…

sp: I wanted to simplify the process.

But in order to highlight the strength of pig’s feet later, I only slightly simplified it, and there are a lot of words, don’t like it!