Chapter 122 (1/2)
Cheng Nuo's speed is very fast.
The first ten multiple-choice questions and the last five fill in the blank questions, Cheng almost did not spend much energy, in about ten minutes to complete all.
The last six questions. They are trigonometric function, solid geometry, probability, sequence, analytic geometry and derivative.
All of them are common in the examination, but the difficulty depends on the level of the teacher.
Obviously, Mr. GE's ability to work out questions has been tested by several generations of people, and he is absolutely as difficult as he can be.
Within the scope of the examination, try to make the most difficult questions!
This is Mr. GE's criterion.
I'm not afraid to die, but I'm afraid I won't cry!
Cheng Nuo shrugged his shoulders, turned the paper to the back, drank his mouth comfortably, and then pulled the draft paper that had not been moved to him.
Big topic, let's go!
Let f (x) = sin (Wx - π 6) + sin (Wx - π 2), where 0 is less than w and less than 3, and f (π 6) = 0
(1) find w
(2) lengthen the abscissa of each point on the image of function y = f (x) to twice of the original (the ordinate remains unchanged), and then shift the obtained image by π 4 units to the left to obtain the image of function y = g (x), and find that G (x) is in the range of [- π 4, 3 π 4 】The minimum value on the
This is a very basic trigonometric function.
Cheng Nuo doesn't even need to calculate on scratch paper. Work out the correct steps directly in your brain.
The rest, Cheng Nuo only need to do is copy the answers in his mind on the answer sheet.
…………
The examination time is passing by minute by second.
In two hours of math exam time, even if you take out a set of test papers with ordinary difficulty for examinees to do, before the bell rings at the end of the test, no matter whether they are right or wrong, they can finish all the questions on the test paper. I'm afraid that 10% of the candidates can finish all the questions on the test paper.
Not to mention this year's set of topics. Compared with previous years, I don't know how many grades are higher.
Even if the grade examination is often the top few of the school bully group, even do not have 50% confidence, can complete all the questions.
Even Lao Tang, a few days before the exam, specially said to the people in class 18.
If the math test paper is too difficult, try to pick up what you can do. Can not do the topic, do not iron head baby, do not regret, directly skip! It's not the same as the test paper.
If there's still time left in the end, go back and try it. If you don't have time, just write something and get a formula score.
Finally, a big problem, strategic give up!
Generally speaking, the difficulty of the last big question is the most difficult one in a set of papers.
The first question is still normal. If you calculate, you can still work it out. As for the second question
Direct can make you doubt life!
There are so many delicate questions in the final part of the paper that no math bully is bent down! It's not just a joke.
…………
Time came to the 30th minute.
While other candidates are still struggling to choose or fill in the blanks, Cheng Nuo has come to the last question.
This is a question about derivative.
”The function f (x) = (X-2) e ^ x + a (x-1) ^ 2 has two zeros.
(1) BR) let x (2) be less than the range of zeros (x 2)
At first glance, this problem is very simple, and the conditions and questions given are very concise. In fact, it's not very difficult to calculate the first problem.
But
He let him be strong, take him as skin!