Cheng Nuo's lecture hall is open!

What should I do if I don't know how to do it?

It's mostly fee!

Just a bottle of Shenbao!

Cheng Nuo picked up two bottles of Shenbao from the bookshelf, handed them to Zhao Yang and Li Peng each, and then started his learning bully lecture mode.

Cheng Nuo has read the three questions that Zhao Yang can't do.

To Cheng Nuo, there are countless women Ah bah, it is to read a problem innumerable experience to see, these three topics, than the general entrance examination topic, more difficult.

It's no wonder that Zhao Yang, who believes that his math level is good, has only made two of the five questions.

"Do you really know how to do it?" Zhao Yang looks up and down Cheng Nuo with suspicious eyes.

For Cheng Nuo's talent in mathematics, after more than a month's understanding, Zhao Yang has a very profound understanding.

It can be said that Cheng Nuo was able to become the only mathematics full score in the college entrance examination, which is absolutely not accidental.

Therefore, this time when he encountered a problem that he couldn't, Zhao Yang thought of taking over the Book Differential mathematics and its application and turning to the page that Cheng Nuo said.

The title of that page is "the properties of geodesics in differential geometry"!

This and the special meow Hua Luogeng integral has the half dime relation!

"Cough..." Cheng Nuo coughed a few times, and then he laughed, "I remember wrong. I remember wrong. Well, let's skip the topic and take a look at the fourth question. "

Cheng Nuo originally wanted to preach for this reason, but now it seems that he has been screwed up.

Cheng Nuo took Zhao Yang's exercise book and continued to talk about the fourth question.

"Find the sequence limit L = LIM (arctan n + 1n - π 4) √ n ^ 2 + n."

Cheng Nuo is not too difficult for this topic.

Basically, without too much thinking, Shua Shua, under the gaze of Zhao Yang and Li Peng, Cheng Nuo wrote down his own solution steps on the draft paper.

“π4=arctan1，arctann+1n=arctan(1+1n)”

“f(x)=arctanx，……”

The formula for this topic is a little more complicated.

But for Cheng Nuo, it is only the calculation formula complexity.

In less than two minutes, Cheng Nuo had written his last stroke.

“l=lim…… =0.5。”

Ignoring the surprised eyes of two people nearby, Cheng Nuo directly calculated the fifth question.

It's still about the limit.

However, it is very complicated to find the limit formula. We can't solve the problem with Lagrange's mean value theorem, lophida's rule, pinch theorem, Taylor's formula and so on.

In addition, Cheng Nuo combined Cauchy convergence theorem with Stolz Theorem.

“limf(x)x^n+1=limf(x+h)-f(x)(x+h)^n+1-x^n+1……”

After more than ten formulas, Cheng solved the problem easily.

"Do you understand?" Cheng Nuo doesn't look up. He puts on his pen cap and asks them at the same time.

"There are still a few formulas left to be understood." Li Peng told the truth.

"Here, here. Take it back to the dorm and have a look." Tear, Cheng Nuo will be the draft of the page torn off, put into Li Peng's hand.

Li Peng and Zhao Yang got up and said, "thank you, Cheng Nuo. Li Peng and I will go first."

Cheng Nuo waved his hand. "No, thank you. It's right for you to help each other."

Zhao Yang nodded, "then Cheng Nuo, if you have any trouble in the future, we will try our best to help."

Cheng Nuo smiles, "that feeling is good."

After mutual politeness, Cheng Nuo watched Zhao Yang leave the dormitory.

As soon as the door of the dormitory is closed, Cheng Nuo quickly lies on the computer desk and shouts to the other three people in the dormitory, "hurry, while there is still time, let's open another round. In this game, I don't believe we can't eat chicken yet

…………

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