Liu Xuan saw that there were a lot of people discussing on the podium, and she also had a question she wanted to ask, so she asked Xia Junxin below.

Xia Junxin took it and looked at it, and it was also the last big question.

Xia Junxin took the pen and wrote down his problem-solving steps on paper first.

It's just that this step is exactly the same as the one in the answer.

Xia Junxin told Liu Xuan and wrote down the knowledge points she needed, and Liu Xuan listened carefully.

Then Wang Chenchen on the podium saw it, and he actually talked about the last question.

interrupted everyone's discussion and said in a snarky voice: "Yo, Senior Sister Xia will also talk about this topic, so let's talk about it together?" ”

Xia Junxin's pen that continued to write stopped, and he looked up and glanced at Wang Chenchen.

A few students next to him also looked at it.

Some people also persuaded Wang Chenchen that Senior Sister Xia is no longer something that ordinary people can afford to provoke, what kind of capital does Wang Chenchen have, and he has been looking for unpleasantness here.

Wang Chenchen was not afraid of things, and said loudly: "What? Don't you dare? ”

Liu Xuan next to her gently pulled Xia Junxin: "...... Senpai. ”

The momentum on the senior sister is quite scary, Liu Xuan is afraid that she will go up and beat people again if she is impulsive.

Xia Junxin gave her a reassuring smile, and just as she wanted to stand up, Yuan Naruto behind her got up.

"I'll tell you!"

Yuan Naruto is also very good at math and is one of the few people in the class who has a difficult score.

It's just that he only answered half of this question correctly, and the other half looked at the answer, and he also studied it a little better.

It's not an exaggeration to try to talk about it.

Wang Chenchen was unhappy: "Let Senior Sister Xia talk about it, is to give her a chance to prove herself, Yuan Mingren, what are you anxious about?" ”

Yuan Mingren pointed at her with his finger: "Wang Chenchen, can you not be so cheap?" ”

Wang Chenchen said curtly: "...... Senior Sister Xia doesn't want to forget it, so if your husband hasn't said anything, your suitor will dismantle me. ”

"You-"

Yuan Naruto gritted his teeth.

And Xia Yanqing, who was sitting in the first row, didn't say a word from beginning to end, he didn't have to worry about his sister not being able to answer or suffering a loss.

Sure enough, Xia Junxin stood up directly and walked to the podium.

The expression on his face was faint, but the calmness exuding from his eyes made everyone involuntarily attracted to it.

The beauty is already very eye-catching.

If it is a beauty with both beauty and wisdom, it is worthy of everyone's admiration.

Xia Junxin picked up the chalk and wrote on the podium.

Verify ∑ 1n253, where n starts from 1......

With the scaling method, the answer is very long.

Full of math formulas.

As time passed, all that remained on the blackboard was the sound of chalk moving.

Wang Chenchen glanced at the blackboard and took the lead in interrupting her thoughts: "Senior Sister Xia, why did you solve it for a long time, and it is still the same as the answer?" ”

The whole class looked at Wang Chenchen in shock......

As a result, Xia Junxin chuckled, and his face was like a flower blooming in summer.

"Think the answer is the same? I have an easy way to do it. ”

After speaking, in the remaining half of the blank space of the blackboard, the direct conclusion of "Boom" ∑1nlim∑1n=π26106=53.

Compared with the other half of the blackboard, I don't know how many times it is streamlined.

Looking at those unfamiliar formulas, the whole class looked confused.

Then Xia Junxin turned around and threw the chalk in the chalk box.

looked at Wang Chenchen, who was at a loss: "Do you understand?" ”

Wang Chenchen was stunned, where could he still speak.

……