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基础数学 今日: 3 |主题: 32742|排名: 3 

版主: luyuanhong
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预览 这个帖子掩没了,还是单独贴出来让识者看看吧  ...23 moranhuishou 2009-10-10 20:02 247066 moranhuishou 2009-10-29 16:07
预览 关于 x^4 - 3^4 =0 跟 x^4 - 81 =0 是不是两个相同的方程的问题  ...234 fleurly 2009-10-20 16:59 379881 moranhuishou 2009-10-29 16:05
预览 关于Cantor的连续统假设 attachment zhaolu48 2009-10-29 15:49 33181 zhaolu48 2009-10-29 16:01
预览 请教一个数学问题 wssami 2009-10-29 14:14 03207 wssami 2009-10-29 14:14
预览 【趣题征解】证明:若一个图中有 V 个顶点而没有任何三角形,则图中边数 E≤V^2/4 luyuanhong 2009-10-28 17:20 23168 luyuanhong 2009-10-29 12:07
预览 【趣题征解】证明:若对任何 a,b,有│f(a)-f(b)│≤(a-b)^2,则 f(x) 必恒等于常数 attachment luyuanhong 2009-10-28 16:36 63436 luyuanhong 2009-10-29 10:53
预览 【趣题征解】证明:对任何正整数 n ,n^4+2n^3+2n^2+2n+1 都不可能是完全平方数。 attachment luyuanhong 2009-10-28 16:20 33222 波浪 2009-10-28 21:50
预览 [讨论]多个点群的费马点是否在同一直线上 attachment daixi 2009-10-27 19:28 43553 bardo 2009-10-28 20:42
预览 【趣题征解】将 1,2,3,5,8,10,11,12 平分为两组,使两组数字之和、平方和、立方和 luyuanhong 2009-10-28 16:14 13059 kanyikan 2009-10-28 16:47
预览 [求助]请教:Lipschitz函数的正则性的问题 insatiable 2009-10-28 13:57 03168 insatiable 2009-10-28 13:57
预览 时钟三角形  ...2 無言 2007-9-28 23:14 187508 kanyikan 2009-10-28 13:43
预览 关于周期函数的问题 salmontrout 2009-10-28 11:11 23010 salmontrout 2009-10-28 11:49
预览 经常看到网上围棋上有一些人  ...2 wanwna 2009-10-23 15:33 195729 尚九天 2009-10-27 17:53
预览 [求助] 问大伙一下,这个结论对么?如何证明啊? 风花飘飘 2009-10-27 10:43 43005 kanyikan 2009-10-27 11:55
预览 值域的问题 attachment wozys 2009-10-25 10:55 33100 luyuanhong 2009-10-27 09:53
预览 反函数与原函数交点问题 attachment wozys 2009-10-25 10:48 22993 wozys 2009-10-27 09:04
预览 积分题目,面试碰到的,做不出来就不能上班!!  ...2345 paocai 2006-8-4 14:51 4627962 尚九天 2009-10-27 07:44
预览 已知 a(i)>0,i=1,2,…,n ,∑a(i)=M ,求 ∑a(i)^2/a(i+1) 的最小值。 luyuanhong 2009-10-25 11:42 13068 luyuanhong 2009-10-26 23:31
预览 [贴图]1.2.3.4````````````` machi5188 2005-11-3 22:18 25577 尚九天 2009-10-26 20:21
预览 [原创] 尚九天说可以—— attachment 风花飘飘 2009-10-26 19:03 02170 风花飘飘 2009-10-26 19:03
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\frac{\square}{\square}\sqrt{\square}\square_{\baguet}^{\baguet}\overarc{\square}\ \dot{\baguet}\left(\square\right)\binom{\square}{\square}\begin{cases}\square\\\square\end{cases}\ \begin{bmatrix}\square&\square\\\square&\square\end{bmatrix}\to\Rightarrow\mapsto\alpha\ \theta\ \pi\times\div\pm\because\angle\ \infty
\frac{\square}{\square}\sqrt{\square}\sqrt[\baguet]{\square}\square_{\baguet}\square^{\baguet}\square_{\baguet}^{\baguet}\sum_{\baguet}^{\baguet}\prod_{\baguet}^{\baguet}\coprod_{\baguet}^{\baguet}\int_{\baguet}^{\baguet}\lim_{\baguet}\lim_{\baguet}^{\baguet}\bigcup_{\baguet}^{\baguet}\bigcap_{\baguet}^{\baguet}\bigwedge_{\baguet}^{\baguet}\bigvee_{\baguet}^{\baguet}
\underline{\square}\overline{\square}\overrightarrow{\square}\overleftarrow{\square}\overleftrightarrow{\square}\underrightarrow{\square}\underleftarrow{\square}\underleftrightarrow{\square}\dot{\baguet}\hat{\baguet}\vec{\baguet}\tilde{\baguet}
\left(\square\right)\left[\square\right]\left\{\square\right\}\left|\square\right|\left\langle\square\right\rangle\left\lVert\square\right\rVert\left\lfloor\square\right\rfloor\left\lceil\square\right\rceil\binom{\square}{\square}\boxed{\square}
\begin{cases}\square\\\square\end{cases}\begin{matrix}\square&\square\\\square&\square\end{matrix}\begin{pmatrix}\square&\square\\\square&\square\end{pmatrix}\begin{bmatrix}\square&\square\\\square&\square\end{bmatrix}\begin{Bmatrix}\square&\square\\\square&\square\end{Bmatrix}\begin{vmatrix}\square&\square\\\square&\square\end{vmatrix}\begin{Vmatrix}\square&\square\\\square&\square\end{Vmatrix}\begin{array}{l|l}\square&\square\\\hline\square&\square\end{array}
\to\gets\leftrightarrow\nearrow\searrow\downarrow\uparrow\updownarrow\swarrow\nwarrow\Leftarrow\Rightarrow\Leftrightarrow\rightharpoonup\rightharpoondown\impliedby\implies\Longleftrightarrow\leftharpoonup\leftharpoondown\longleftarrow\longrightarrow\longleftrightarrow\Uparrow\Downarrow\Updownarrow\hookleftarrow\hookrightarrow\mapsto
\alpha\beta\gamma\Gamma\delta\Delta\epsilon\varepsilon\zeta\eta\theta\Theta\iota\kappa\varkappa\lambda\Lambda\mu\nu\xi\Xi\pi\Pi\varpi\rho\varrho\sigma\Sigma\tau\upsilon\Upsilon\phi\Phi\varphi\chi\psi\Psi\omega\Omega\digamma\vartheta\varsigma\mathbb{C}\mathbb{H}\mathbb{N}\mathbb{P}\mathbb{Q}\mathbb{R}\mathbb{Z}\Re\Im\aleph\partial\nabla
\times\cdot\ast\div\pm\mp\circ\backslash\oplus\ominus\otimes\odot\bullet\varnothing\neq\equiv\not\equiv\sim\approx\simeq\cong\geq\leq\ll\gg\succ\prec\in\ni\cup\cap\subset\supset\not\subset\not\supset\notin\not\ni\subseteq\supseteq\nsubseteq\nsupseteq\sqsubset\sqsupset\sqsubseteq\sqsupseteq\sqcap\sqcup\wedge\vee\neg\forall\exists\nexists\uplus\bigsqcup\bigodot\bigotimes\bigoplus\biguplus\bigcap\bigcup\bigvee\bigwedge
\because\therefore\angle\parallel\perp\top\nparallel\measuredangle\sphericalangle\diamond\diamondsuit\doteq\propto\infty\bowtie\square\smile\frown\bigtriangledown\triangle\triangleleft\triangleright\bigcirc \wr\amalg\models\preceq\mid\nmid\vdash\dashv\nless\ngtr\ldots\cdots\vdots\ddots\surd\ell\flat\sharp\natural\wp\clubsuit\heartsuit\spadesuit\oint\lfloor\rfloor\lceil\rceil\lbrace\rbrace\lbrack\rbrack\vert\hbar\aleph\dagger\ddagger

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