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

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Some people in the group even couldn't tell whether it was a physics problem or a math problem.

Anyway, just not.

There are now seventy or eighty people reviewing in the group!

But most of them are just to watch the excitement!

They just want to see if these questions are as difficult as the legend says!

Now, they all give up!

Some people voluntarily withdraw from the group.

They themselves know how much they weigh, and there is no need to make a fool of themselves!

in the live room.

Ge Huaihuai was stunned.

The audience in the live broadcast room thought they were stuck.

"Is it stuck?"

"No! Absolutely not! Look, the thing next to it is still moving! It's absolutely impossible to be stuck!"

"Huaihuai? How about this question? Have you solved it yet?"

do?

How to do it?

Ge Huaihuai's whole body is not well.

"This is not an ordinary physics problem... this should be a competition problem?"

"I'm sorry! Everyone! I'm a liberal arts major! I didn't choose physics! If it's mathematics, it's okay!"

"So, please understand!"

Ge Huaihuai used this excuse to keep his personality temporarily.

But in a few seconds——

The group owner posted another question, "@All Members, this question is a math question, please read it!"

已知H是锐角三角形ABC的垂心，以边BC的中点为圆心，过点H的圆与直线BC相交于两点A1、A2；以边CA的中点为圆心，过点H的圆与直线CA交于两点B1、B2；以边AB的终点为圆心，过点H的圆与直线AB相交于两点C1、C2，证明：六点A1、A2、B1、B2、C1、C2共圆。

After posting the question, the group owner said, "Because this question is not difficult, please solve it within half an hour! Start the timer from now."

"And the method is simple. Xu Heng and I have discussed it a lot, and there are at least two solutions!"

"But everyone just needs to give any solution!"

What the hell! ! !

Is this still human?

Not too difficult? !

Is this question too difficult?

At least two solutions? !

Can you just name one?

Be yourself!

How could it be possible to give an answer in such a short time!

Ge Huaihuai almost swears, but in front of so many viewers in the live broadcast room, she endured it!

The fans howled.

"Is this a topic that can only be done by a top student?"

"Huaihuai! The group leader has already said it, it's not a difficult question, you should be fine, right?"

puff-

Ge Huaihuai almost vomited blood.

no problem?

How can there be no problem? It takes more than ten minutes for me to review the questions, and you let me figure out the answers to the questions within half an hour?

It is really difficult!

Anyway, it is really difficult for her!

"Hiss... this, this..."

"I'm going to get a pen and paper!"

She really doesn't want to roll over!

She wants to solve this problem.

But the moment she got the pen and paper, she reviewed the questions repeatedly, but she didn't know how to start.

Ge Huaihuai, "%￥#@#..."

The whole person is not good.

Freshman!

She would like to ask, what is this topic?

High school or college?

But there are thousands of people watching her in her live broadcast room, how can she do this?

For the sake of image, she can't!

She became irritable.

But someone in the group has already asked, "@集主, high school question, or university question?"

Group leader, "High school, Math Olympiad questions."

high school!

High school question?

But I am a college student, why do I still feel tired!

"hiss……!"

I don't know how many times I've gasped for air.

In short, Ge Huaihuai has been silent in the live broadcast room.

She looked at the question seriously.

She picked up the pen a few times and wanted to write, but after a few times, she put it down.

Every time I put down the pen, my expression becomes uglier.

"Half an hour, no one can succeed!"

"impossible!"

"This, this, this..."

She murmured repeatedly!

Watching the seconds go by...

It's been more than 20 minutes. On her paper, there are only two words "proof".

"Hiss...impossible!"

"I don't think anyone can solve this problem in 30 minutes!"

"This question has a certain degree of difficulty..."

But the voice has not yet fallen!

Someone posted the process of solving the problem in the group.

Not just one person!

What a coincidence!

These people really used different proof methods!

The group owner checks one by one...

Ge Huaihuai also clicked on it and checked them one by one.

Prove:

B0 and C0 are the centers of sides cA and AB respectively.Let A be the other point of intersection between the circle with side B0 as the center passing through point H and the circle with center C0 passing through point H as A, then AH is perpendicular to...

……

同理可得，OA1=OA2=OB1=OB2，所以，A1、A2、B1、B2、C1、C2，六点都在以O为圆心，OA1为半径的圆上，所以A1、A2、B1、B2、C1、C2共圆。

This is the first person to post it. He is correct, so he can join the group!

But people with slow hands are not so lucky.

Because after the first person sent it out, the second and third ones used the same method as him, so they could only miss the opportunity in vain.

Who is faster!Who is right!Who can join the group!

Look at the problem-solving process of the fourth person:

Suppose the outer center of the triangle ABC is O, D, E, F are the midpoints on the sides BC, CA, AB respectively, connect DF, intersect BH at point P, then BH⊥DF, then by the Pythagorean theorem...

……

In the end it was proved.

The group owner immediately asked this person to add him as a friend, and then transferred to the group.

The group leader, "Everyone! This question is over like this!"

So many people in the group shouted, "I almost made it! Hey! Just a little bit! Lost in time!"

With that said, this person even took pictures of his process in the group!

Many people followed suit.

Judging from the acting paper, many of them are really working hard, it's just a little bit short!

Can--

This is a female anchor designed by Xueba, but the paper is empty!

Very white!

It was blindingly white.