三星A5000 IMEI:834 怎么查到SN码_百度知道
三星A5000 IMEI:834 怎么查到SN码
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＞＞＞正项数列{an}的前n项和Sn满足：Sn2-(n2+n-1)Sn-(n2+n)=0（1）求数列..
正项数列{an}的前n项和Sn满足：Sn2-(n2+n-1)Sn-(n2+n)=0（1）求数列{an}的通项公式an；（2）令b&n=n+1(n+2)2an2，数列{bn}的前n项和为Tn．证明：对于任意n∈N*，都有T&n＜564．
题型：解答题难度：中档来源：江西
（I）由Sn2-(n2+n-1)Sn-(n2+n)=0可得，[sn-(n2+n)]（sn+1）=0∵正项数列{an}，sn＞0∴sn=n2+n于是a1=s1=2n≥2时，an=sn-sn-1=n2+n-（n-1）2-（n-1）=2n，而n=1时也适合∴an=2n（II）证明：由b&n=n+1(n+2)2an2=n+1(n+2)2o4n2=116[1n2-1(n+2)2]∴Tn=116[1-132+122-142+…+1(n-1)2-1(n+1)2+1n2-1(n+2)2]=116[1+14-1(n+1)2-1(n+2)2]＜116(1+14)=564
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据魔方格专家权威分析，试题“正项数列{an}的前n项和Sn满足：Sn2-(n2+n-1)Sn-(n2+n)=0（1）求数列..”主要考查你对&&等差数列的通项公式，数列求和的其他方法（倒序相加，错位相减，裂项相加等）&&等考点的理解。关于这些考点的“档案”如下：
现在没空？点击收藏，以后再看。
因为篇幅有限，只列出部分考点，详细请访问。
等差数列的通项公式数列求和的其他方法（倒序相加，错位相减，裂项相加等）
等差数列的通项公式:
an=a1+（n-1）d，n∈N*。 an=dn+a1-d，d≠0时，是关于n的一次函数，斜率为公差d； an=kn+b（k≠）｛an｝为等差数列，反之不能。 对等差数列的通项公式的理解：
&①从方程的观点来看，等差数列的通项公式中含有四个量，只要已知其中三个，即可求出另外一个．其中a1和d是基本量，只要知道a1和d即可求出等差数列的任一项；②从函数的观点来看，在等差数列的通项公式中，。。是n的一次函数，其图象是直线y=dx+（a1-d）上均匀排开的一列孤立点，我们知道两点确定一条直线，因此，给出一个等差数列的任意两项，等差数列就被唯一确定了，等差数列公式的推导：
等差数列的通项公式可由归纳得出，当然，等差数列的通项公式也可用累加法得到：
&数列求和的常用方法：
1.裂项相加法：数列中的项形如的形式，可以把表示为，累加时抵消中间的许多项，从而求得数列的和； 2、错位相减法：源于等比数列前n项和公式的推导，对于形如的数列，其中为等差数列，为等比数列，均可用此法； 3、倒序相加法：此方法源于等差数列前n项和公式的推导，目的在于利用与首末两项等距离的两项相加有公因式可提取，以便化简后求和。4、分组转化法：把数列的每一项分成两项，或把数列的项“集”在一块重新组合，或把整个数列分成两个部分，使其转化为等差或等比数列，这一求和方法称为分组转化法。5、公式法求和：所给数列的通项是关于n的多项式，此时求和可采用公式求和，常用的公式有：& 数列求和的方法多种多样，要视具体情形选用合适方法。 数列求和特别提醒：
（1）对通项公式含有的一类数列，在求时，要注意讨论n的奇偶性；（2）在用等比数列前n项和公式时，一定要分q=1和q≠1两种情况来讨论。
发现相似题
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566886466025471334509117337473405978刚度等级：SN1250、SN2500、SN5000、SN10000是什么意思？_百度知道
刚度等级：SN1250、SN2500、SN5000、SN10000是什么意思？
我有更好的答案
刚度承受压力为多少Pa
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出门在外也不愁SNRemove - Remove strong name signature from .NET exe/dll files
SNRemove v1.00
Copyright (c) 2005 Nir Sofer
Description
When a dll or exe file is signed with strong name keys, .NET doesn't allow you to modify it.
If you try to use a signed assembly, after you have made some changes with Hex editor or any other tool,
you'll get the following exception:
An unhandled exception of type 'System.IO.FileLoadException' occurred in system.windows.forms.dll
Additional information: Strong name validation failed for assembly 'MyAssembly.Test'.
If you try to run a signed executable file after you have made some changes in it, you'll
get the following error message:
String name validation failed for assembly... The file may have been tampered with or it
was partially signed but not fully signed with the correct private key.
This utility removes the reference to strong name signature from .NET exe and dll files.
After removing the strong name reference, you can make any change you want in dll/exe file,
without getting any exception or error message. However, be aware that assemblies with no
strong name reference cannot be added into the Global Assembly Cache (GAC).
Using SNRemove
Using SNRemove is very simple - just extract the snremove.exe to any folder you like, and
run it from Command Prompt with the desired command-line parameters.
SNRemove Usage
SNRemove [options] &filename&
Remove the reference to Strong Name signature from the specified file.
Display the Strong Name signature of the specified file.
The &filename& parameter may also contain wildcards.
SNRemove -r c:\myfiles\dll1.dll
SNRemove -d &c:\my files\*.dll&
System Requirements
Although this utility is designed to work with exe and dll files created for .NET environment,
the utility by itself wasn't written in .NET, which means that it can work in all
versions of Windows, even if .NET Framework is not installed.
This utility is released as freeware.
You are allowed to freely distribute this utility via floppy disk, CD-ROM,
Internet, or in any other way, as long as you don't charge anything for this.
If you distribute this utility, you must include all files in
the distribution package, without any modification !
Disclaimer
The software is provided "AS IS" without any warranty, either expressed or implied,
including, but not limited to, the implied warranties of merchantability and fitness
for a particular purpose. The author will not be liable for any special, incidental,
consequential or indirect damages due to loss of data or any other reason.
If you have any problem, suggestion, comment, or you found a bug in my utility,
you can send a message to