Xueba, I beg you to go and escort him quickly!

In an instant, all the math teachers felt that they were redundant.

On the blackboard, Xu Heng directly erased his proof process!

I started to discuss his topic with Mr. Ge.

It's a matter of lines and circles.

Xu Heng, "Teacher Ge, we can change this question, and we don't need to ask so many questions, two questions, three questions..."

Teacher Ge's eyes lit up, "Tell me about it?"

Xu Heng erased half of Teacher Ge's original question and changed his original question.

In polar coordinates, it is known that the circle C passes through the point P (root 2, π/4), and the center of the circle is the intersection point of the straight line ρsin (θ-π/3)=-(root 3)/2 and the polar axis. Find the element Polar coordinate equation of C.

Such a change of topic!

Directly change the original problem of straight line and circle to the problem of polar coordinates.

Instantly raised several grades.

Teacher Ge nodded in satisfaction.

All the math teachers' scalps were numb.

Xu Heng, Xu Heng!

Be yourself!

Although you removed the last two questions of the previous question!

But you only have the difficulty of this question, which has surpassed the original question!

"hiss……!"

"The Great Demon King! This is definitely the Great Demon King!"

"Two major demon kings in the world of math papers!"

"I thought Xu Heng was just like that... No matter how powerful he is, he can't be compared with Teacher Ge! I was reckless! I was wrong! This guy is scarier than Teacher Ge!"

"One Teacher Ge is scary enough!"

"And now another one!"

All the mathematics teachers have begun to mourn for the students who took the Nine Schools Entrance Examination this year.

Teacher Ge and Xu Heng continued to discuss.

"If there is only one question for this question, it will seem a bit stretched. Why don't you just change it to a fill-in-the-blank question?"

Teachers, "Pfft—"

Xu Heng's eyes lit up, "Fill in the blanks? That's fine too! I have no objection."

"It's not that difficult, is it?"

Teacher Ge nodded, "Yes..."

To your sister!

Mr. Ge, you should quickly take over your supernatural powers!

Xu Heng is messing around, why are you messing around too!

Nima! ! !

When I first heard that Xu Heng had proposed questions for the Math Olympiad, it was because all the teachers united and opposed that the Math Olympiad survived.

But even so, the questions in last year's Math Olympiad were still super difficult!

Well now.

No one restrains Xu Heng, he is going to heaven!

This question, no matter how you look at it, is a big question!

It takes about half an hour to answer alone!

But you can talk about it and put it in the fill-in-the-blank question?

Aren't you letting those examinees die?

Xu Heng and Teacher Ge looked at the group of math teachers, "What's your opinion? What do you think?"

What do you think?

%￥#￥#@￥￥……

What do we think, don't you see the shocked expressions on our faces?

We were so shocked that our facial features were distorted!

Xu Heng frowned and turned to look at Teacher Ge.

"Mr. Ge, do you think this question is difficult?"

Teacher Ge shook his head.

"But why do they all feel so difficult?"

As they spoke, Xu Heng and Teacher Ge turned their heads to look at the blackboard.

Very seriously, "It's not difficult...it's not difficult at all!"

"That's right! It's not like this...this..."

Teacher Ge said, "Calculate the coordinates of the center of the circle based on the intersection point of the straight line sin(θ-π/3)=-(root 3)/2 and the polar axis."

Xu Heng, "Show love, and then calculate the radius of circle C based on circle C passing through point P (square root 2, π/4), and thus obtain the polar coordinate equation of circle C!"

The teachers couldn't help complaining, "It's easy for you to speak! It hurts my back when I stand and talk!"

"!!!"

Teacher Ge frowned and rolled his eyes at everyone, "You guys are going too far. Even Xu Heng, who is only a sophomore in high school, thinks this question is easy. After all, you are also teachers who have been working on papers for many years, and you still call it difficult?"

Everyone, "%￥%#￥##..."

Nima!

I beg you!

Get the magic power!

Be a person!I beg you!

Hey……

They curled their lips one by one, "I know that Teacher Ge will suffer from our math test papers..."

"I never expected that Xu Heng's appearance would make the math paper even worse!"

"hiss……"

Xu Heng and Mr. Ge don't care what the teachers think, now they have to prepare other questions.

"Student Xu Heng, do you think that question just now can be the final fill-in-the-blank question?"

Xu Heng thought for a while, "Isn't it? It's that simple..."

Teacher Ge, "I think it's also..."

All the teachers' jaws almost dropped to the ground.

Fuck Fuck Fuck Fuck!

This question!

You still don't put the fill-in-the-blank finale at the end?

You guys even want to prepare the real fill-in-the-blank finale?

"You must be crazy! Teacher Ge! Student Xu Heng! You must be here for revenge, right?"

"They're only in their third year of high school! What kind of enmity do you have with you? Are you going to treat them like this?"

Even the teachers who produced the papers pleaded for the "innocent" candidates.

"Leave them alone! What if some students can't think about it?"

"Teacher Ge! Xu Heng! Show mercy!"

"..."

PS: Thank you [tail number 0462] for your support!

Kneel for all support! .

Chapter 311

Xu Heng, "Hey..."

Teacher Ge, "Hey..."

Both sighed.

That's it?

With such a simple question, you start to sympathize with those high school candidates~?

Teacher Ge said earnestly, "If you don't experience setbacks, how can you grow-?"

"How to face the real college entrance examination?"

"Is this just a test?"

"Everyone! Believe in us! Xu Heng and I agree that the hardships suffered by these candidates today will be their precious wealth in the future, during the college entrance examination!"

"..."

Teacher Ge said a lot, "I hope everyone can understand my hard work!"

Careful... hard work?

Such good intentions?

Is it really good?

It is true that those examinees who cry for the exam are real!

!!!

Just when the group of teachers were struggling, Xu Heng wrote a question on the blackboard:

As shown in the figure, in order to protect the old bridge OA on the river, a new bridge BC is planned to be built, and a circular protection area is set up at the same time. The planning requirements: the new bridge BC is perpendicular to the river bank AB.

The boundary of the protected area is a circle whose center M is on the line segment OA and is tangent to BC, and the distances from O and A at both ends of the ancient bridge to any point on the circle are not less than 80m. At 60m to the north, point C is at 170m due east of point O (OC is the river bank), tan∠BCO=4/3.

(1) Find the length of the new bridge BC;

(2) When the OM is long, the area of ​​the circular protected area is the largest?

This question examines the tangent equation of a circle and the positional relationship between a straight line and a circle.

Not only did the topic come out, but the picture was also drawn by Xu Heng.

"Look! Look at Xu Heng's drawing! This circle!"

"Circle? What's wrong? What's wrong with this circle?"

"Is this circle very round? Is there something wrong?"

"Didn't you notice that Xu Heng didn't use compasses to draw the circle? He drew it freehand!"

Draw circles freehand!

Perfect circle!

"Crash..."

It was only when these teachers realized that they came back to their senses.

"!!!"