设 $A,B,C$ 是同阶方阵, 试证: $$\bex (A-B)C=BA^{-1}\ra C(A-B)=A^{-1}B. \eex$$

[Everyday Mathematic]20150216的更多相关文章

  1. [Everyday Mathematic]20150217

    设 $f:\bbR\to\bbR$ 二阶可微, 适合 $f(0)=1$, $f'(0)=0$, 并且 $$\bex f''(x)-5f'(x)+6f(x)\geq 0. \eex$$ 试证: $$\b ...

  2. [Everyday Mathematic]20150213

    设 $f:\bbR\to\bbR$ 三阶可微, 试证: 存在 $\xi\in (-1,,1)$, 使得 $$\bex \frac{f'''(\xi)}{6}=\frac{f(1)-f(-1)}{2}- ...

  3. [Everyday Mathematic]20150212 求 $(\cos x+2)(\sin x+1)$ 的最大值

    设 $$\bex t=\tan \frac{x}{2}, \eex$$ 则 $$\bex \cos x=\frac{1-t^2}{1+t^2},\quad \sin x=\frac{2t}{1+t^2 ...

  4. Everyday is an Opportunity

    Quote Of The Day: “Everyday is an Opportunity to Learn and Grow, Don’t Waste Your Opportunity.” – Al ...

  5. HDU 4282 A very hard mathematic problem 二分

    A very hard mathematic problem Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/sh ...

  6. the design of everyday things

    Design principles: Conceptual models Feedback Constraints Affordances All are important. This is wha ...

  7. [Compose] 21. Apply Natural Transformations in everyday work

    We see three varied examples of where natural transformations come in handy. const Right = x => ( ...

  8. HDU 4282 A very hard mathematic problem --枚举+二分(或不加)

    题意:问方程X^Z + Y^Z + XYZ = K (X<Y,Z>1)有多少个正整数解 (K<2^31) 解法:看K不大,而且不难看出 Z<=30, X<=sqrt(K) ...

  9. [Everyday Mathematics]20150304

    证明: $$\bex \frac{2}{\pi}\int_0^\infty \frac{1-\cos 1\cos \lm-\lm \sin 1\sin \lm}{1-\lm^2}\cos \lm x\ ...

随机推荐

  1. 把Message转换成String

    把Message转换成String注意,这里欠缺CM消息和CN消息,因为它们不是系统消息,不经过Dispatch API转发,但是可以把它们写在WndProc里,这样SendMessage送来的消息也 ...

  2. 275. H-Index II

    题目: Follow up for H-Index: What if the citations array is sorted in ascending order? Could you optim ...

  3. Ubuntu 13.10 安装Qt5

    Qt5在Ubuntu的软件中心是找不到的,只能从Qt的官网下载安装. http://qt-project.org/downloads,选择完整的Linux版本(qt-linux-opensource- ...

  4. Control character in cookie value, consider BASE64 encoding your value

    这是因为你给Cookie设置了中文的value,比如Cookie c = new Cookie("user", "张三");

  5. Myeclipse中无法删除部署在tomcat上的工程

    一直以来,都无法顺利地从myeclipse里删除部署,不信,你看: myeclipse 10.7+tomcat7 myeclipse 2014+tomcat8 都是这样,一个问题 我们要干掉的项目为b ...

  6. Matlab多个Figure图合成一个Fig

    案例:之前跑过的程序 已经生成了多个matlab图,现在需要进行合并到一个图中. 解决方案,利用图像句柄把figure图像中的参数读入到内存中,然后重新subplot绘制. 程序如下: clc;cle ...

  7. IE6下position:fixed;兼容

    *html{ background-image:url(about:blank); background-attachment:fixed;}/*解决抖动问题*/ .backto-top{ width ...

  8. 用root直接登入ubuntu 14_04

    官网下载地址:http://www.ubuntu.com/download/desktop64位桌面版:http://www.ubuntu.com/ubuntu-releases/14.04/ubun ...

  9. Hadoop集群（第6期）_WordCount运行详解

    1.MapReduce理论简介 1.1 MapReduce编程模型 MapReduce采用"分而治之"的思想,把对大规模数据集的操作,分发给一个主节点管理下的各个分节点共同完成,然 ...

  10. BZOJ3028: 食物

    题目:http://www.lydsy.com/JudgeOnline/problem.php?id=3028 题解:列出母函数乘起来化简之后再展开,用插板法即可. 代码: #include<c ...