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

Page 14

"I, I...Look! There is a classmate cheating! I will help you catch the cheating classmate!"

"That classmate! What are you doing!"

Finally became famous!

A classmate cheated, and three or four teachers rushed in in an instant.

This battle!

Who has seen it!

"Wow! I don't dare anymore! I was wrong! Woooooo..."

His legs were weak on the spot, his body tilted, and he fell to the ground.

This classmate was frightened.

Teachers, you think highly of me too!

and many more!

Aren't you catching cheaters?

But why are your eyes looking elsewhere!

What the hell!

Hastily!

Didn't you catch me?

He was remorseful.

Following the eyes of these teachers, the student saw Xu Heng.

Xu Heng was concentrating on his math test paper.

I don't even realize what's going on around me!

But these teachers stared blankly.

This……!

For a while, the atmosphere in the examination room was weird!

Finally, the students sitting behind Xu Heng couldn't bear it anymore.

"I blew myself up! I won't take the exam!"

Get up and run away.

Because he cheated!

Being watched by so many teachers, he felt guilty, trembling all over, unable to write any more.

Several teachers, "???"

Yao Ruiyi pouted, "Team leader, look at them! Persuade them! Let them go back to their own examination room, and don't disturb the students in my examination room!"

Guo Maosheng is also looking forward to it at this time!

He has already stepped into the examination room with half a foot.

……

PS: Thank you [has been blackened, thank you for your invitation] for your reward!

Three rewards!

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Chapter 19

When Yao Ruiyi said that, Guo Ruisheng retracted his feet in embarrassment, and called the teachers away.

The examination room is considered quiet.

Another invigilator looked at Yao Ruiyi, confused.

"Teacher Yao, what's going on?"

Yao Ruiyi, "It's nothing! Seriously invigilate the exam!"

She couldn't say any more, if she did, the teacher didn't know what would happen.

Although Yao Ruiyi is a Chinese teacher, she is also a graduate student.

Although mathematics is not her strong point, she still has confidence in asking a graduate student to read high school mathematics topics.

After looking around, she always returned to Xu Heng's side in disbelief.

Another invigilator said, "Mr. Yao, you have been around him three or four times. Do you suspect this classmate is cheating?"

"Don't worry! It's impossible for him to cheat, I'll be watching the whole process!"

"At first, I saw that the pen in his hand was faster than ordinary classmates, but the more I looked at it, the more I felt that this classmate was amazing."

"Look at his state, this is not an exam! It feels like playing!"

"Others are frowning and frowning, but he is good, not to mention, but also to do it in one go!"

"Watching him answer the questions, I feel an inexplicable sense of comfort!"

"Teacher Yao, do you know this student? He must be a top student!"

"If only this were my student!"

Yao Ruiyi snickered!

This is my student!

She is proud!

I checked the time, and the exam was only half an hour past.

Many students have just finished the multiple-choice questions and entered the fill-in-the-blank questions.

But Xu Heng has already solved the problem.

已知命题p：x∈R，使得x平方-2x+m＜0，命题q：方程x平方/（m+1）+y平方/（2-m）=1表示双曲线.

(1) Write down the negative form of proposition p;

(2) If the proposition P is false and the proposition q is true, find the value range of the real number m.

Before he knew it, two invigilators walked up to Xu Heng, one on the left and one on the right.

They all stretched their necks and tilted their heads, staring at Xu Heng's test paper.

Xu Heng picked up his pen.

solution:

(1) Negative form of proposition p:

-P: x∈R, all have x squared -2x+m≥0.

(2) Since p is false, that is, -P is true, so △=4-4m≤0, that is, m≥1;

又命题q为真，则有（m+1）（2-m）＜0，即m＜-1,或m＞2；

So when P is false and q is true, m>2.

Not a single extra word!

After finishing writing, Xu Heng went straight to the next question.

As shown in the figure, the triangular prism ABC-A1B1C1, A1A is perpendicular to the base ABC, and the length of each edge is equal, D, E, F are the midpoints of AB, BC, A1C1 respectively.

(1) Prove that EF is parallel to plane A1CD;

(2) Find the sine of the angle formed by the line BC and the plane A1CD.

Not even 1 minute.

Xu Heng almost read the questions and started to answer them.

solution:

(1) Connect ED, A1F is parallel to ED and A1F=ED, so A1FED is a parallelogram, so...

……

Xu Heng's writing speed is very fast.

Swish swish!

The two invigilators were dumbfounded.

"Wait……"

Subconsciously, they want to stop Xu Heng, they really want to ask: Do you guys not think after reading the questions?Pick up a pen and do it?Can you guarantee it is right?

Ha ha!

How much do you think one plus one equals? Need to think?

Not all read the question, the answer is ready to come out!

Before Yao Ruiyi finished the last question, Xu Heng had already finished the next one, picked up his pen and began to answer.

"This……!"

The jaws of the two invigilators almost dropped to the ground, they looked at each other, dumbfounded.

Keep watching!

The second small question, when finding the sine value, Xu Heng directly wrote down on the test paper: (root 5)/5, which gave the answer directly.

The two invigilators said, "???"

What the hell?

They review the questions immediately.

Oh, it is for the sine value!