共查询到20条相似文献，搜索用时 62 毫秒
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一方面,通过几个典型例题的解题分析,突出利用泰勒级数展开求解未定式极限问题的特点;另一方面,通过未定式求极限的思想给出nΣk2和∞Σn12求和问题的新方法。 相似文献
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贾延 《佳木斯教育学院学报》2012,(10):16-17
L’Hospital法则是求解未定式极限的一种简便、有效的方法。文中通过对L’Hospital法则的定理和相关例题的分析,归纳总结了未定式的类型、具体的化简转化方法以及在使用该法则时需要注意的5个方面,以此来帮助学生对这一法则的应用更好的理解和掌握。 相似文献
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未定式1^∞的计算是极限计算的重要组成部分．在满足一定条件下,未定式1^∞可运用洛必塔法则直接计算．但洛必塔法则求解未定式既非万能,也非最佳．当洛必塔法则的条件不再满足时,可借助重要极限,选择凑构法、等价无穷小替换法反泰勒式展开法等,从而巧妙地得到问题的解． 相似文献
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李晓辉 《潍坊教育学院学报》2011,(3):70-73
用洛必达法则求未定式的极限很有效,但对某些型的极限它并不方便,甚至用它不能求出。本文讨论了不定式极限的各种类型并给出了求解这类极限的一些方法与技巧,结合具体例子分析未定型极限的求解过程,给出了一些未定型极限的求解方法及原则,深刻地揭示了未定型极限的求解思路,从而使一些原本复杂的问题简单化。 相似文献
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未定式的计算是极限计算的重要组成部分．对于未定式1^∞,在满足一定条件下,可通过适当变换后再运用洛必塔法则直接计算．但洛必塔法则求解未定式既非万能,也非最佳。当该条件不满足时,洛必塔法则不能直接使用,可借助高等数学中的重要极限,选择凑构法、等价无穷小替换法及泰勒式展开法等来计算,从而巧妙地得到问题的解． 相似文献
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许月 《新课程学习(社会综合)》2011,(10)
求极限是高等数学中最重要的内容之一,也是高等数学的基础知识。求极限的方法有很多,其中之一是用洛必达法则求解未定式0/0型与∞/∞ 型及其相对应变形形式,本文具体给出了利用洛必达法则求极限值题。 相似文献
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《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
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《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
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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
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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
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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
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献