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

Everyone said, "Then you eat quickly!"

"Yes! By the way, Xu Heng, which examination room are you in?"

"Why didn't I see you! I asked several classmates in different examination rooms, and they all said they didn't see you!"

How did they know that Xu Heng was alone in the examination room.

Xu Heng didn't intend to say this, but the students in the second class of high school who came over from behind became proud one by one.

"Xu Heng went to the examination room by himself!"

Everyone, "!!!"

"A test room by yourself?"

"Is there a teacher proctoring the exam?"

"My God! Can't it be?"

Swish swish!

Each of them stood against Xu Heng stubbornly.

"The school takes you too seriously!"

"Is it because you are afraid that you will cheat?... Uh... no! Is it because you are afraid that you will give other students the answer!?"

"This exam is really important! And it's too strict! Several students who cheated were kicked out of the exam room!"

"Yes! Once discovered! Directly deal with 0 points!"

"There are even more people who come to inspect, and the frequency is more!"

"..."

The topic ranged from the question to shocking Xu Heng alone in the examination room, and then from the one-person examination room to the strictness.

Taking advantage of this opportunity, Yue Pingting ate quickly, and when she finished eating, she immediately ran away.

Those who run are called fast!

Hide after running!

Yue Pingting held her head high and proud, "Well, how can you thank me?"

grateful?

it is good!

That must be thanks to you!

Seeing no one around, Xu Heng leaned forward.

"Ah! Xu Heng! It's in broad daylight! You are a big villain! You are so big! You... woo woo..."

Xu Heng, "I thank you, do you still like it?"

Yue Pingting rolled her eyes, "No way! You took advantage of me!"

Xu Heng, "Then what do you want?"

Yue Pingting said, "Hmph! I want to return it! I'll do it!"

Hey!

This girl, is she trying to save face?

Confused again, she didn't pay attention, no matter what, is she the one who suffers?

……

PS: Thank you [hu11266] [___Twilight Cool Year?]

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Chapter 98

Math test in the afternoon.

The invigilators in other examination rooms did not change.

But Xu Heng, the teacher in the examination room, changed to two strangers.

Xu Heng took a look.

The two teachers smiled at him, and he smiled back politely.

The exam begins and the math papers are handed out.

"It's not enough to play straw paper, tell me, and I'll give it to you."

Xu Heng, "Thank you teacher, no need."

Need not?

The two teachers looked suspicious.

Looking at each other, I thought I had heard wrong!

Although they knew that Xu Heng got perfect marks, they didn't know how Xu Heng answered the questions at all.

Xu Heng answered the question.

The directrix equation of the parabola y=-4x is...

……

If the maximum value of the function y=x+2cosx in the interval [0, π/2]...

……

It is known that the inequality (mn) square + (m-lnn+λ) square ≥ 2, for any m ∈ R, n ∈ (0, +∞) is always true, then the value range of the real number λ is...

These two invigilators were looking at Xu Heng!

For the previous fill-in-the-blank questions, he didn't even use the straw paper!

it is good!

If you can't use it, you can't use it!

It just means you have a great brain!

You are indeed a classmate who can get full marks in the exam!

but--

You still don't need this question?

The two teachers looked at each other and seemed to be smiling.

Because they have a little smug meaning.

After seeing how many questions you have done, you don't need to play the straw paper, it seems that this is provoking people.

The school exams are given to play papyrus, which is what the students need!

You haven't used it all the time, which makes people feel a little uncomfortable.

The two teachers were indeed a little uncomfortable before, but now they decided that Xu Heng had to use straw paper!

Are you still obediently submitting?

Is it possible that you can figure out the answer?

impossible!

Absolutely impossible!

The two teachers have this idea, so they are very happy.

But not for a minute...

Xu Heng wrote the answer later:

λ≥2（根号下2）-1或λ≤-2（根号下2）-1

Get it!

After that, move on to the next question.

"This... this! This..."

The two teachers were dumbfounded.

This is a test paper from the city!

18 No one will know the answer beforehand!

Impossible!

Right now, there is only one process that Xu Heng can give an answer to, and that is to do it by himself!

They are willing to believe that Xu Heng did it himself!

but--

But this question cannot be answered by brain calculation!

It's useless to play straw paper!

Hard brain count?

Is this brain still a human brain?

While they were shocked, Xu Hengyou finished a question.

Seeing Xu Heng's calm expression, the two invigilators trembled in their hearts.

The two went aside and whispered.

"Does he always ask questions like this?"

"According to this speed, he should be able to hand in the paper a lot earlier..."

"I don't know! Look at him, he is so serious, it seems that he always answers questions like this..."

"It's too scary!"

"Don't take the topic as a topic at all."

"It's a bit too disrespectful to the teacher's hard work!"

While the two were muttering, Xu Heng solved another problem.

under:

It is known that circle C passes through points A(5,1) and B(1,3), and the center C is on the x-axis.

(1) Find the standard equation of circle C;

（2）求直线3x+4y+4=0被圆C截得的弦长；

(3) P is the point on the straight line L: x=-2, if there is a straight line passing through the point P and intersecting the circle C at points M, N, and M is exactly the midpoint of the line segment NP, find the value of the ordinate of the point P scope.

Get started after reading the topic.

solution:

(1) It is known that the center of the circle is on the x-axis, and the coordinates of the center of the circle are (a, 0), and the radius is r.

Then the circle equation is (xa) square + (y-0) square = r square, that is, (xa) square + y square = r square.

Since the circle passes through (5,1) and (1,3), the system of equations is obtained:

(5-a) square + 1 square = r square

(1-a) square + 3 square = r square

The solution is a=2, r=10 under the root sign.

So the circle equation is (x-2) square + y square = 10.

(2)……