Xueba God-level system

"What happened, tell me quickly." Sure enough, Li Hu was still curious and wanted to know the answer inadvertently.

At this time, Cheng Yaotie glanced at Niu Zihao, he wanted to laugh, but he held back, let me tell you, "Mr. Wu heard that you and Wang Xiang are missing, because Wang Xiang's parents are both working in other places, and they are not. It's convenient to come here, so he called your father and told you to go home and reflect for a month, and then go back to school after the mid-term exam."

"Ah, this is bad." Li Hu grabbed his hair, as if he was in pain. Youth really is made up of troubles, but what he didn't realize was that it was all made up of lies. , and the creator of this plan is Niu Zihao.

Li Hu's Arthur has been on the phone for more than two minutes, but this is no longer important.If he didn't save Wang Xiang, he might be able to escape this catastrophe. Now, it is not clear what kind of situation Wang Xiang is in.

"Wang Xiang, he was sucked in by the computer, do you believe this?" Li Hu didn't want to talk about it at first, and he was afraid that Niu Zihao and the others would gossip, but it was the truth.

I saw Niu Zihao said something to Cheng Yaotie next to him, and then Cheng Yaotie left very wisely.

"Li Hu, I believe everything you said, but the head teacher doesn't necessarily believe him!" Niu Zihao looked at the computer game interface in front of him and let Li Hu sit next to him, while he was enjoying himself.

"Houyi, didn't you see him hiding in the grass, idiot." Niu Zihao picked up the mouse and started killing directly. As for Wang Xiang entering the computer, he was not surprised at all, even someone like himself To be possessed by the Xueba God-level system, then what else is impossible.

Seeing that Niu Zihao was playing games, Li Hu, who was looking at him stupidly, rolled his eyes and thought of a clever trick. He was playing all the games. If the teacher asked, he said that Niu Zihao offered him to play games in the Internet cafe. , but I arrived a few hours earlier than him.

"Brother, what are you thinking, don't frown, what can't you think about?" Niu Zihao handed Li Hu a chewing gum, "Look how scared you are, I lied to you about calling your parents just now. ."

As soon as he finished speaking, Li Hu was stunned on the spot, and the emotion he showed was both anger and joy.He was angry that Niu Zihao had lied to him, but he was glad that he had lied well. If this were true, then he would definitely go home without the pain of smacking his butt with the sole of his shoe, just like drawing wages from the bottom of the pot.

Chewing a big bubble gum in his mouth, Li Hu asked inadvertently, "You still eat bubble gum, isn't that what girls like to eat?"

"It's from a girl, Gao Yaxuan gave it to me." Niu Zihao was playing games, but he didn't expect this to come out of his mouth, "Well, after I finished the text, she gave it to me."

"Well, you don't need to be so secretive, I know all this, I'm from the past." Li Hu showed a gossip smile, and he also felt that things were not as simple as imagined, there must be something tricky in it, "Then I meet Gao Yaxuan later, do I have to call her Niu-sao!"

"Don't talk nonsense, if Cheng Yaotie hears it, I promise I won't kill you." Niu Zihao grabbed Li Hu's hand as if twisting a twist, "You take back what you just said, and you can't say it again in the future. already."

On second thought, he actually wanted Li Hu to call Gao Yaxuan a niu sister-in-law.But if Li Hu really called out like that one day, would Gao Yaxuan get angry and stop playing with her in the future, Niu Zihao didn't dare to think about it any more.

Cheng Yaotie came to the place where the network manager was located according to Niu Zihao's intention.His purpose was to call up the surveillance video to see how Wang Xiang disappeared.

"Okay, go back all the way to the place where the two of them just entered the door." Cheng Bite said, and gradually discovered the incredible scene in the video.

The two of them did not enter the Internet cafe at the same time, and one of them went to the toilet.Since the cameras of the Internet cafes are not too high-resolution, and Li Hu and Wang Xiang are both wearing the same school uniform, it is difficult to accurately distinguish who the two of them are.In layman's terms, the two of them are the same person, at least from the monitoring.

Then, he was about to watch it again, but what appeared on the monitoring screen at this time was just a black and white pattern of snowflakes, similar to a TV.

As soon as the key moment comes, the chain is dropped. It seems that this is someone specializing in sabotage.As for who it is and what he wants to do, it is still unknown.

"Boss, do you have any other surveillance cameras here?"

When the images of the other cameras were called up, the network manager was also puzzled. It was still the same as the original pattern, and still no useful information was displayed.

"You said, is it a line failure or a camera failure?" Cheng Bite was trying to guess. After all, he also learned a lot of useful knowledge in the book, like Goldbach's conjecture.Although he is not very good at making conjectures, he still named this kind of conjecture he just made, the Cheng Bite Conjecture.

"No, if the line is faulty, there will be no image on the display screen. Now, it should be interfered by a super strong electronic virus." The network administrator made her guess. Obviously, Cheng Biao The iron conjecture has long been untenable.

"Then you say this Li Bai is Wang Xiang?" Niu Zihao asked.

"That's right, I should have chosen the hero, but I didn't expect him to take the lead. It's really unreasonable." Li Hu now just wants to use Arthur to kill him fiercely, but the opponent is too strong. Just think about it.

"Hey, how come a question popped out after this highland tower was pushed?" This is what makes Niu Zihao puzzled. Why is the glory of the king this way of playing? Is it testing my IQ?Don't be afraid, I have the Xueba God-level system, and I can solve any problem.

What was displayed on the computer screen was a compulsory high school math question just after Arthur knocked down the enemy's mid-high tower.Niu Zihao is very sure that as long as he solves this problem, breaking the crystal is a piece of cake.

He first glanced through the questions roughly, and saw that the position of the question should be the second to last question in the test paper. It was really a difficult problem!

In fact, the more difficult the question, the more challenging it is for Niu Zihao, which is also conducive to the development plan of a scholar.

已知函数f(x)=loga(2x+1)，g(x)=loga(1-2x)(a>0且a≠1)，

(1) Find the domain of definition of the function F(x)=f(x)-g(x);

(2) Judge the parity of F(x)=f(x)-g(x), and explain the reason;

(3) When determining the value of x, there is f(x)-g(x)>0.

Little thing, Niu Zihao stared at the question, a series of analysis and calculations had already started in his brain.

A>0 and a≠1 appear in the title, which is actually a limiting condition, which is also the range of the base a in the logarithmic function.

Here it is necessary to understand the mutual conversion of exponential and logarithmic formulas and related concepts: ax power = N→logaN = x, although it looks a bit complicated, it is better to look at the simplest one first.The previous ax power = N was attended in junior high school, but if the item of x power is listed separately, it becomes the logarithm of high school.

Just imagine, if a=1, any power of 1 is equal to 1, log1N=x, substituting into the formula: 1=1, which itself has no meaning.The most basic property of logarithms is that 0 and negative numbers do not have logarithms.

After thinking about this clearly, since a is a number greater than 0 and not equal to 1, then the value range of N is greater than 0. N may wait for 1. For example, when x=0, a to the power of 0 is 1.

再看一眼题目上所描述的，可以充当N的角色有f(x)函数里的2x+1，还有g(x)里的1-2x，要使函数有意义，则有{2x+1>0，1-2x>0，2x>-1，x>-1/2，-2x>-1，x0，则loga(2x+1)-loga(1-2x)>0，即loga(2x+1)>loga(1-2x).

At this time, Niu Zihao suddenly thought of the image and properties of exponential functions.