共查询到20条相似文献，搜索用时 62 毫秒
1.
胡廷佳 《数学学习与研究(教研版)》2009,(8):13-13
抽象函数是指没有给出具体解析式,仅用抽象函数符号揭示某种性质的函数．由于这类试题既能全面地考查学生对函数概念的理解及性质的代数推理和论证能力,又能综合考查学生对数学符号语言的理解和接受能力,以及对一般和特殊关系的认识,从而对考查学生的创新精神、实验能力和运用数学的能力,有着十分重要的作用本文根据近年来的教学经验．谈抽象型函数问题的解决方法． 相似文献
2.
《中学生数理化(高中版)》2016,(11)
<正>抽象函数是指没有给出具体的函数解析式,但给出了函数满足的一部分性质或运算法则的函数。此类函数单调性的证明既能全面考查学生对函数概念的理解及性质的代数推理和论证能力,又能综合考查学生对数学符号语言的理解与接受能力。它的难点在于大多数这类函数具有抽象性与隐蔽性,一部分学生在判断f(x_2)- 相似文献
3.
4.
函数不仅是高中数学的核心与主线内容,也是学习高等数学的基础．而抽象函数问题是函数中一类综合性比较强的问题．这类问题往往具有抽象性、综合性、技巧性等特点．它既是教学的难点,又是近几年高考中的热点．此类函数问题既能全面地考查学生对函数概念的理解及性质的代数推理和论证能力,又能综合考查学生对数学符号语言的理解和接受能力,以及对一般和特殊关系的认识． 相似文献
5.
函数是中学数学的重点内容，而抽象函数问题又是函数内容中的难点之一．抽象函数一般是指没有给出具体的函数解析式或图像，但给出了函数满足的一部分性质或运算法则的函数问题．由于此类函数问题既能全面地考查学生对函数概念的理解及性质的代数推理和论证能力，又能综合考查学生对数学符号语言的理解和接受能力，以及对一般和特殊关系的认识，所以备受命题者的青睐，在高考试题中也经常出现．下面通过例题，对这类问题中经常遇到的四点性质进行探讨． 相似文献
6.
7.
8.
康金东 《数学学习与研究(教研版)》2010,(7):83-83
函数是每年高考的热点,而抽象函数性质的应用又是函数的难点之一。函数是指没有给出具体的函数解析式或函数图像,但给出了函数满足的一部分性质或运算法则。此类函数试题即能全面考查学生对函数概念的理解及性质的代数推理和论证能力,又能综合考查学生对数学符号语言的理解和接受能力以及对一般和特殊的认识。所以备受命题者的青睐,相信在以后的高考试题中也会不断出现。我们有必要在这一方面做些初步的研究。 相似文献
9.
田园 《中学数学教学参考》2006,(19)
高考结束,本打算对一年的高考复习做些回顾,恰在这时,收到了《中学数学教学参考》第6期,并拜读了文卫星老师的《在双基模块的基础上构建双基平台一一高三复习课“抽象函数”教学实录》一文(以下简称《抽》文),由此激起了我对“抽象函数”教学的再思考.抽象函数问题是高中数学函数部分的难点,也是高中与大学函数部分的衔接点.由于抽象函数试题既能全面地考查学生对函数概念的理解及性质的代数推理和论证能力,又能综合考查学生对数学符号语言的理解和接受能力.以及对一般和特殊关系的认识.从而对考查学生的创新精神、实践能力和运用数学的能力,有着十分重要的作用,因此,这类试题在近年的高考中不断出现.然而,由于这类问题本身的抽象性及其性质的隐蔽性.大多数学生在解决这类问题时,感到束手无策.为了提高学生的应对能力,大部分高三数学教师在组织复习时都会通过专题形式复习这部分内容,但在复习时,如何把握抽象函 相似文献
10.
解抽象函数问题的常用策略 总被引：1，自引：0，他引：1
张传鹏 《数理化学习(高中版)》2007,(7)
抽象函数是指没有给出函数的具体解析式,但给出了函数满足的一部分性质或运算法则的函数问题.抽象函数问题是高中数学函数部分的难点,也是高中与大学函数部分的衔接点.由于这类试题既能全面地考查学生对函数概念的理解及性质的代数推理和论证能力,又 相似文献
11.
12.
13.
《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
14.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
15.
Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
16.
Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
17.
18.
RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
19.
20.
唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献