This top-tier academic genius

There are 4 ways to solve this problem in Chapter 10.

8 PM.

Xiao Hui opened Douyin on time, found the live stream room of 【Yanyan Loves Learning】, and clicked to enter.

Unexpectedly, the live stream has already been going on for a while.

Just like last night, the incredibly handsome boy in front of the camera was now quietly reading a book.

At this point, the number of viewers in the live stream had exceeded two hundred, and the chat had started. Some of the viewers were IDs I had seen yesterday, while others were new IDs.

[The streamer is so good-looking! (#^.^#)]

Why isn't this streamer saying anything? Weren't they supposed to sing?

[Is the person upstairs new here? Didn't you notice the title? This is a learning livestream; singing will have to wait until the end, depending on the streamer's mood.]

[That's right, this is a learning livestream, not an entertainment livestream. There's a concept I don't quite understand, it's from the first year of high school, could someone please help me with it...?]

The comments section started discussing studying again.

Lin Yan, in front of the camera, was working on "Mathematical Analysis." Perhaps the difficulty had increased, because he found that his progress was slow and not as efficient as before.

Even because of studying all day, I couldn't sit still and concentrate as much as I did during the day.

"It seems that even with a talent for mathematical factors, a focus level of 0.3 is still a bit insufficient."

Lin Yan remembered that there was also a [Focus Experience Card I (1 hour)], so he decisively took it out and used it to test the effect.

The moment after using it, Lin Yan felt refreshed and invigorated. The drowsiness and fatigue he had felt earlier vanished, and his mind became clear instantly.

This feeling is even more refreshing than chewing Extra gum and then having a mint.

The panel has changed.

[Focus: 0.4 (59:54)]

So this is what it feels like to have high concentration. If you have such strong concentration with a level of 0.4, what does it feel like to have a level of 1 concentration? Like taking off from the spot?

Lin Yan didn't dare to think too far ahead and threw himself back into his studies, because he realized that another 3 seconds had secretly slipped away, which was a complete waste.

The effect is remarkable; knowledge points that previously required more thought can now be understood instantly.

His focused improvement meant that he only had eyes for the book in front of him, and his brain selectively blocked out the surrounding factors. He didn't even notice when his mother put a sliced ​​apple on the table for him.

Lin Yan was completely immersed in the ocean of mathematics, like a greedy fish devouring small fish and shrimp. Every bite was a delight, and he was extremely happy.

Outside the door, Lin Muyuan and Wang Lanyin watched their son, who was completely absorbed in his studies, feeling both gratified and heartbroken.

I'm relieved that my son has finally cheered up and fallen in love with learning, but I'm also worried that his hard work might damage his health.

In fact, the couple did not have high expectations for their son. It would be better if he could get into university, but it wouldn't matter if he couldn't.

The important thing is for my son to do what he likes, just like we supported his career in the entertainment industry before.

Unexpectedly, the road was not smooth, and it even made the son depressed for a time.

Fortunately, it's all in the past now.

Lin Yan flips through books very quickly, often finishing a page in half a minute.

This left the viewers in the live stream somewhat incredulous, and some raised questions in the chat.

Wow, he reads so fast! Faster than I can read a novel.

[Knowing he was studying math, you'd think he was reading a novel. Was he really absorbed in it, or was he just pretending?]

I saw online that he was a fake genius who failed miserably; I don't believe anyone can learn math that quickly by just reading a math book.

[Those upstairs are probably newbies; the streamer is really good at math.]

Indeed, the host not only reads quickly, but also solves problems even faster.

Those who say it's impossible to read that fast probably haven't seen a genius. There's a math genius in the class next to ours who reads about that fast too.

[If you're really that good, how come you were fired after your fake academic record was exposed?]

Who knows? Maybe the streamer is severely unbalanced in their skills, or maybe the agency is incompetent.

......

Lin Yan had no time to pay attention to the arguments in the comments; he was rapidly absorbing knowledge, his mind racing.

Time passed by, and an hour later, the time for the focused experience card was up. The feeling of being refreshed and incredibly clear-headed vanished instantly. Lin Yan only felt a little dizzy, tired, and a bit hungry.

It seems I've been mentally exhausted.

However, his efficiency was astonishing; he had almost finished reading the book "Mathematical Analysis".

Since that's the case, I might as well take a break and do some practice problems.

Lin Yan noticed a sliced ​​apple next to him, which his mother must have put there sometime ago. He had actually sensed someone coming next to him at that time, but his attention was entirely focused on his book, and his brain selectively blocked it out.

Only now does he have time to watch the live stream.

There were still about 500 people in the live stream, and the chat was currently discussing a math problem, which immediately piqued Lin Yan's interest.

It turns out that a netizen named "Xiao Xiao" said that her tutor gave her a math problem that she still couldn't solve, and she wanted to ask everyone for help.

Given that the inequality x−lnx+1≥kx always holds for any real number x>0, find the maximum value of the real number k.

Lin Yan immediately recognized that this was a problem about finding the range of parameters for an inequality that always holds true; it was neither unusual nor strange, and quite common.

Seeing that Lin Yan had finally stopped reading and started looking at his phone, some viewers in the live chat called on Lin Yan to explain.

Lin Yan took a bite of his apple and said, "Hmm, this problem isn't too difficult; there are four solutions."

Wow, you can solve this problem just by looking at it?

[Four types? Why do I, also a senior in high school, only know one?]

[Really? I don't believe it, streamer, please explain!]

Lin Yan had already picked up a pen and carefully adjusted the live stream camera to point it at the table.

As he wrote, he explained, "The first method is the conventional differentiation method, the most common but also the slowest. First, we perform rearrangement and separation, k ≤ 1 - (ln x - 1)/x, let g(x) = ......"

"The second method uses the constructive isomorphism approach. First, transform the original expression to x+1≥kx+lnx, then construct h(x)=x−lnx....."

At this point, the comments section was already scrolling.

Wait, why can't I understand anything the streamer is saying? Is it because I'm a terrible student?

I know the first method, but I've never even heard of the structure of the second one.

I got 128 on my last monthly math exam, and I also said I didn't understand it.

[The host is a senior in high school, and so am I, but something feels off.]

[No way, I came here to listen to the streamer sing, but I didn't expect him to actually want to teach me. (Cracks open)]

[Eyes: I understand; Brain: You don't understand anything.]

......

Lin Yan continued, his pen never ceasing.

"The third method, using L'Hôpital's rule, yields the result in one step..."

"The fourth one can be expanded using Taylor series: lnx = ln(1 + (x−1)) = ......"

The comments are still scrolling:

[I'm a freshman majoring in mathematics, and this streamer is really something. Is he really a high school student?]

[This isn't just a top student, this is a genius!]

Why is there such a huge difference between people? (Thinking)

Mathematics is simple: you either know it or you don't. Host, you're amazing! (thumbs up)

"These are the only four solutions I can think of. I hope they are helpful."

After finishing listing them, Lin Yan put down his pen.

Xiao Hui's mind went blank behind the phone screen. She had come seeking an answer, only to be given four solutions at once, leaving her somewhat bewildered. Aside from the first method, she couldn't understand the other three at all.

However, Xiao Hui still typed: "Thank you, you know too much."

This live stream room attracted many students.

Afterwards, other netizens also posted math problems, and Lin Yan provided solutions to them one by one.

The learning atmosphere in the live broadcast room was stronger than ever before.

Just before the show ended, at the request of the audience, Lin Yan sang "My Deskmate" again. Because she had learned the diaphragmatic breathing method, she sang it more steadily and better this time.

Meanwhile, several spectators recorded the scene.

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