共查询到20条相似文献，搜索用时 265 毫秒
1.
吴行民 《语数外学习(初中版)》2009,(9):19-21
一、乘方的意义
求n个相同因数的积的运算,叫做乘方．a·a……a=a^n,读作a的n次方。乘方的结果叫做幂,即a^n叫做幂．a^n也读作a的n次幂．a叫做底数,n叫做指数．例如,（-3）^2读作负3的2次方或负3的2次幂,底数是-3,指数是2,9是它的幂． 相似文献
2.
Smarandache对偶函数的一个猜想 总被引：1，自引：0，他引：1
乐茂华 《韩山师范学院学报》2004,25(3):1-2
对于正整数n，设S^*(n)是，n的Smarandache对偶函数．该文证实了有关S^*(n)的一个猜想． 相似文献
3.
本文主要利用比较判别法,Sdding公式和Raabe判别法证明了幂级教^∞∑n=0（2n）!/（n!）^2x^2n在其收敛区间右端点的发散性。 相似文献
4.
顾森 《数理天地(初中版)》2013,(7):8-8,10
例1将2^21、3^34、4^25按照从小到大的顺序排列．分析两个底数都大于1的幂,若底数相同,则指数大的幂的值较大;若指数相同,则底数大的幂的值较大．本题中三个幂的底数和指数互不相同,该如何比较？ 相似文献
5.
王昊天 《初中生世界(初三物理版)》2014,(4):58-58
探究活动中有关幂的结果的个位数字是什么的问题吸引了我的注意力．3^1=3、3^3=9、3^3=27、3^4=81、3^5=243、3^6=729、3^7=2187、3^8=6561…其结果的个位数字分别是3、9、7、1、3、9、7、1…个位数字显然是4个数字循环出现．我提出的问题是：还有什么数字的n次幂（凡为正整数）的个位数字是4个数字循环的呢？有其他循环情况吗？ 相似文献
6.
利用三角函数幂公式、L’Hospital法则、分部积分公式和数学归纳法，得到含有三角函数的第一类广义积分∫0^∞（sinαx/x）^ndx的计算公式，其中n≥2且α≠0。 相似文献
7.
韩小卫 《西安文理学院学报》2008,11(3):49-51
利用多模压缩态理论,对介质中两态叠加多模叠加态光场｜ψ^（α）〉q的不等幂次Nj次方和压缩特性进行了详细的研究．结果发现当各模压缩幂次数之和为偶数时,介质中多模叠加态光场｜ψ^（α）〉q恒处于不等幂次Nj最不测不准态;而当各模压缩幂次数之和为奇数时,多模叠加态光场｜ψ^（α）〉q在一定条件下呈现出周期性变化的Nj次方和压缩效应． 相似文献
8.
设{Xn；n≥1}是i．i．d.随机变量列，Sn=∑^n k=l Xk，e（ε）=∑^m n=1 P（｜Sn｜≥nε），在适当的条件下，我们证明了lims↓0 ε^3/2（e（ε）-σ^2/ε^2）=0，其中σ^2=VarX1。 相似文献
9.
顾央青 《宁波职业技术学院学报》2002,2(1):101-102
幂指函数的极限类型很多，是《高等数学》教学中的一个重点和难点，学生学习往往都很困难，本对常用的幂指函数极限的各种情况作出了较完整的概括，并对“A^B”“1^∞”，“∞^0”，“0^0)这几种进行举例应用，谨供教学考。 相似文献
10.
11.
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
12.
13.
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
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.
YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
16.
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
17.
18.
GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献
19.
The awareness of individualism can be traced back to the period of American Revolution when the Declaration of Independence was produced.It expressed basic beliefs concerning freedom,equality,democracy,privacy and the relationship between people and government,which were exactly what the philosophy of individualism mostly dealt with at that time.This paper is to exploit the essence of individualism by analyzing the Declaration .The analysis enables us to reconsider its significance to the issue of America human rights and foreign policies. 相似文献
20.
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