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在各种考试中,新定义函数题备受命题者的青睐,这类问题情境新颖,背景公平,能够有效地考查学生的学习能力和解决问题的应变能力,有较好的区分度.碰到新定义函数题,必须认真读题,对新定义的函数有准确的理解,这是顺利解题的前提.由于新定义函数题的命题背景仍然是课本上的某些知识点,所以只需结合函数的定义(函数表达式或函数满足的性质)将其转化为我们熟悉的问题模型,就可以找到合适的解题突破口了.本文赏析几道近期出现的新定义函数题,供大家参考.题1(山东省烟台市2013届高三上学期期中考试理)已知函数f_M(x)的定义域为实数集R,
In a variety of examinations, the newly defined function questions are favored by the proponents, such problems are new in context and background is fair, can effectively examine students’ learning ability and ability to solve problems, have a good distinction. New definition of function questions, you must read the questions carefully, the new definition of the function has an accurate understanding of this is the prerequisite for a smooth solution to the problem.As the new definition of the function proposition background is still some of the knowledge on the textbook, so just the combination Function definition (function expression or function to meet the nature) will be transformed into our familiar problem model, we can find a suitable solution to the problem of breach.This article Appreciation of a few recent new definition function problems, for your reference. 1 (Yantai City, Shandong Province, the third semester of the 2013 senior high school examinations) known function f_M (x) domain is the real set of R,