Chapter 123: Treat him as a melon skin

　　 Cheng Nuo's questioning speed is very fast.
　　 The first ten multiple-choice questions and the next five fill-in-the-blank questions, Cheng Nuo did not spend much energy, and took about ten minutes to complete them.
　　 There are six big questions behind. They are trigonometric function, solid geometry, probability, sequence of numbers, analytic geometry, and derivative.
　　 are common question types in exams, but the difficulty of the question depends on the level of the teacher.
　　 Obviously, Uncle Ge’s ability to write questions has been tested by many generations, and it is absolutely as difficult as possible.
　　 Within the scope of the test, try to maximize the difficulty of the question!
　　 This is the guideline of Uncle Ge.
　　 I'm not afraid of dying you, I'm afraid of not crying for you!
　　 Cheng Nuo shrugged, turned the test paper to the back, took a sip of water comfortably, and then pulled the untouched draft paper in front of him.
　　 Big question, start!
　　" Let the function F(x)=sin(wx-π/6)+sin(wx-π/2), where 0 is less than w and less than 3, and it is known that F(π/6)=0
　　 (1) find w
(2) Extend the abscissa of each point on the image of the function y=F(x) to twice the original (the ordinate does not change), and then shift the obtained image to the left by π/4 units to obtain the function y=G(x) image, find the minimum value of G(x) on [-π/4, 3π/4]. "
　　 This is a very basic trigonometric function problem.
　　 Cheng Nuo doesn’t even need to calculate on draft paper. Calculate the correct problem-solving steps directly in your brain.
　　 All that Cheng Nuo needs to do is copy the answers in his mind on the answer sheet.
　　…………
　　 Exam time goes by one minute and one second.
Two hours of math test time, even if you take out a set of test papers of ordinary difficulty for the test takers to do, before the end of the test the bell rings, the test takers who can complete all the questions on the test paper may account for 10 % Of people are good.
　　 Not to mention this year's topic. Compared with previous years, the difficulty level is higher.
　　 Even the top students in the grade exams are not even 50% sure that they can complete all the questions.
　　 Even Old Tang, a few days before the exam, specifically told everyone in Class 18.
　　 This time the math test paper, if it is too difficult, try to pick what you can do. For questions that you can’t do, don’t be iron-headed or sorry, just skip it! Just as there is no such question on the test paper, leave him alone.
　　 If there is still time left at the end, go back and try again. If you don’t have time, just write something and get a formula score.
　　 The final big issue, strategically give up!
　　 Generally speaking, the difficulty of the last big question is the most difficult question in a set of test papers.
　　The first question is normal, but if you do, you can figure it out. As for the second question...
　　 can directly make you doubt life!
　　 There are so many big questions on the finale, and Wu Mathematics has been bent down! This sentence is not just for fun.
　　…………
　　 Time comes to the 30th minute.
　　 While other candidates were still struggling to choose or fill in the blanks, Cheng Nuo had come to the last question.
　　 This is a question about derivatives.
　　"The known function f(x)=(x-2)e^x+a(x-1)^2 has two zeros.
　　 (1) Find the value range of a
　　(2) Let x1 and x2 be the two zeros of f(x), and prove: x1+x2 is less than 2. "
　　 This question is very simple at first glance, and the conditions and questions given are very concise. But in fact, the difficulty of this question is not small. The first question alone requires a lot of calculation.
　　 But...
　　 He forced him to be strong, and treated him as a skin!
　　He let him go and treat him like a melon skin!
　　Cheng Nuo has won the true teachings of Gupi Dafa.
　　 In front of him, all math problems are nothing.
　　 "This question directly uses Lagrange's median theorem, plus the Taylor formula of Peano's remainder, and then..."
　　 Cheng Nuo muttered softly while calculating in his mind.
　　 It is worth mentioning here that the college entrance examination system has undergone some reforms to allow candidates to use solutions outside the scope of the high school syllabus when answering science questions.
　　 Give a chestnut.
　　 Law of Pittsburgh, as everyone knows, this is a law of seeking the limit.
　　 Determine the undetermined value by deriving the limit value of the numerator and denominator respectively.
　　 In the derivation problem, this kind of problem of finding the limit of the comparison of two numbers is very common.
　　 If you use the Law of Lopida, you can easily get the answer.
　　 can...
　　 Labida's law does not belong to the scope of high school syllabus, but a formula that can only be learned in high school mathematics.
　　 Before, the Law of Lobita was not allowed to be used in the college entrance examination. Once used, two points will be deducted.
　　 But the painful thing is that if you don’t use this Law of Pitt, you will spend a lot of calculation steps and time to solve the answer in a very complicated way.
　　 Do you choose to deduct two points or choose to spend more time?
　　 This is a dilemma for Xueba.
　　 However, after the reform, this situation no longer exists.
　　 The questions for the college entrance examination can be done with the knowledge points of the university. Even as long as you can, you can do it with the knowledge of graduate students!
　　 But if you do this, you have to take a certain risk.
　　 If the answer is correct, it's better to say ~EbookFREE.me~ The grading teacher will read your problem-solving steps by himself to see if the super-level knowledge used is reasonable.
　　 The answer is wrong, sorry, no matter how well you use the super-level knowledge in front of you, no matter how seamless it is, it will still be...zero!
　　 If the result is wrong, the scoring teacher will not look carefully at your problem-solving steps, let alone have the spare time to research which formula you are using.
　　 So, unless time is really not enough, some people will try to use the knowledge of Chaogang in order to save time.
　　 But Cheng Nuo is good, not only is it used, but it is almost an entire test paper. It doesn't hurt the answer to get zero points.
　　………………
　　 "End, take your work!"
　　 Cheng Nuo made the last stroke on the test paper, put down the pen, and slowly put the test paper neatly on the table.
　　 Slowly press his hands down between the dan fields and let out a light breath.
　　 raised his wrist to check the time, 15:41.
　　 Only 41 minutes have passed since the exam started.
Cheng Nuo looked up at the examination room for a week, and found that almost all the candidates were doing the questions with their heads down. Look like.
Cheng Nuo moved the chair back, found a very comfortable posture, leaned on the back of the chair, raised his legs, picked up the thermos cup on the window sill, unscrewed the bottle cap, gently blew the hot air, and small Sip.
　　 "Ah~~"
　　 Cheng Nuo groaned comfortably, and squinted his eyes, as if he couldn't be more comfortable.
　　………………
　　PS: The less than sign is harmonized by the dot, and only words can be used.
　　The college entrance examination plot ends tomorrow!
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