Chapter 252 (1/2)

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，……”