There are four questions in total.

Pei Qi glanced at the test paper and started from the first question.

Let n be a positive integer, a1, a2, a3...... an，b1，b2，b3…… bn, A, and B are all positive real numbers, satisfying ai≤bi, ai≤A, i=1,2,3,4,......,n and (b1b2b3...... bn）／（a1a2a3…… an) ≤B/A, proof [(b1+1)(b2+1)...... （bn+1）］／［（a1+1）（a2+1）…… （an+1）］≤（B+1）／（A+1）

Pei Qi looked at the question, the corners of his mouth twitched, although he didn't expect any more difficulty than the exercises given to him by Feng Renhong, but it didn't need to be like this, right?

The other classmates, who were completely different from Pei Qi, frowned with the test papers, as if they were facing a great enemy, and they were a little panicked.

Pei Qi did a smooth job in doing the questions, and couldn't help but arouse the sideways eyes of the invigilator on the stage.

Of course he knows this student, the famous Pei Qi.

Students who were hacked on the Internet, disrespected exams, tarnished stepsisters, etc., but he didn't pay attention to these, he only knew that this was the only candidate with a perfect score in the first test.

The whole test paper was perfectly answered, and I couldn't find anything where I could deduct points.

Internet public opinion, he only thinks it's funny, submitting the paper early is disrespecting the exam, and a full score is cheating?

The question team strictly checks, and there is absolutely no missing question, not to mention spending money to buy answers, if you have money, you can get a full score, why didn't you see other rich second generations to participate in the competition and get a full score?

Not to mention that some of the ideas and methods of Pei Qi's test paper have made many experts shine.

Such a person is a scumbag?

So how many top students are there in the world?

The invigilator stared at Pei Qi, watching Pei Qi finish the first question quickly, and nodded with a smile, the first question is a relatively simple question, and he can find ideas so quickly, he is a talent!

Then the invigilator watched Pei Qi finish the second question without any obstacles, and he nodded again, there is still a lot of hope for passing the retest!

Watching Pei Qi finish the third question without pause, he was a little silent, can't this test paper let him be hindered a little?

I think he was also the one who participated in the second test of the high school math league!

The exam lasts 150 minutes!

You're going to make me wonder how difficult it is for us to try a second time! Someone else is still working on the first question!

These two tests are several times more difficult than the first one, please give the question a little face, okay?

The invigilator saw Pei Qi turn to the fourth answer question, and then frowned, he was a little happy in his heart, what's the matter? Do you finally feel the difficulty of our second test?

At the next moment, Pei Qi finished writing the fourth answer question in one go.

Seeing the moment Pei Qi closed the pen cap, the invigilator was sad.

Invigilator: "......" students, is it okay for us to give the teacher a little face?

I teach math and can't do it so fast, how did you grow your brain? I didn't finish the question until the last minute, do you really have the same brain structure as us?

Pei Qi finally checked the answering process, and according to the process summarized these days, he felt that there should be no problem.

The invigilator even felt a little relieved when he saw that Pei Qi was still checking the test papers, after all, people were still doing the questions very seriously and checking them carefully.

Pei Qi glanced at the invigilator and gestured to see if he could hand in the papers?

The invigilator was silent for a moment.