Chủ đề này có 112 trả lời

[TheCard]

$$a^2$$

[Mr Cooper]

$\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1.0cm,y=1.0cm] \clip(4.22,-2.86) rectangle (13.12,4.98); \draw(8.34,0.2) circle (2.330321866180721cm); \draw (6.86,-1.6)-- (9.827822560606734,-1.5935395251149667); \draw (8.334927274150267,2.5303163449309705)-- (6.86,-1.6); \draw (8.334927274150267,2.5303163449309705)-- (9.827822560606734,-1.5935395251149667); \draw (8.334927274150267,2.5303163449309705)-- (8.345072725849732,-2.1303163449309706); \draw (6.035459992649993,-0.1456810011025011)-- (8.345072725849732,-2.1303163449309706); \draw [domain=4.22:13.12] plot(\x,{(-17.62190491273828--2.3096127331997396*\x)/1.9846353438284694}); \draw (7.290242190121254,-0.3951701881975841)-- (7.725725721359615,-1.5981154536142386); \draw (8.770410805388625,1.327371079514322)-- (7.725725721359615,-1.5981154536142386); \draw(7.290242190121254,-0.3951701881975841) circle (1.2793448391923807cm); \draw(8.770410805388625,1.327371079514322) circle (3.1064188996832454cm); \draw (6.035459992649993,-0.1456810011025011)-- (6.86,-1.6); \draw (6.86,-1.6)-- (8.345072725849732,-2.1303163449309706); \draw (8.345072725849732,-2.1303163449309706)-- (9.827822560606734,-1.5935395251149667); \draw (6.035459992649993,-0.1456810011025011)-- (9.827822560606734,-1.5935395251149667); \begin{normalsize} \draw [fill=white] (8.34,0.2) circle (1.5pt); \draw[color=black] (8.44,0.41) node {$O$}; \draw [fill=white] (6.86,-1.6) circle (1.5pt); \draw[color=black] (6.68,-1.63) node {$B$}; \draw [fill=white] (9.827822560606734,-1.5935395251149667) circle (1.5pt); \draw[color=black] (9.92,-1.67) node {$C$}; \draw [fill=white] (8.334927274150267,2.5303163449309705) circle (1.5pt); \draw[color=black] (8.4,2.83) node {$A$}; \draw [fill=white] (8.345072725849732,-2.1303163449309706) circle (1.5pt); \draw[color=black] (8.36,-2.23) node {$K$}; \draw [fill=white] (6.035459992649993,-0.1456810011025011) circle (1.5pt); \draw[color=black] (5.94,0.07) node {$I$}; \draw [fill=white] (7.725725721359615,-1.5981154536142386) circle (1.5pt); \draw[color=black] (7.78,-1.35) node {$M$}; \draw [fill=white] (6.880592857004804,-0.8718982273583699) circle (1.5pt); \draw [fill=white] (7.290242190121254,-0.3951701881975841) circle (1.5pt); \draw[color=black] (7.12,-0.25) node {$D$}; \draw [fill=white] (8.770410805388625,1.327371079514322) circle (1.5pt); \draw[color=black] (8.96,1.37) node {$E$}; \end{normalsize} \end{tikzpicture}$

Bài viết đã được chỉnh sửa nội dung bởi Mr Cooper: 27-04-2017 - 22:50

[roby10]

$a/b$$\frac{2x+3}{3x}}$

$\lim_{x\to\infty}\frac{2x}{3x+5}$

$\sum _{k=1}^n\frac{1}{2\sqrt{x+2}}$

$(\sqrt{2}+1)\left ( \sqrt{3} \right +1)\left ( \sqrt{6} \right +1)\left ( 5-2\sqrt{2} \right -\sqrt{3})$

[Mr Cooper]

\[\left\{\begin{matrix} x^3-y^3+6x^2-3y^2=-12x+3y-7\\ y\sqrt{x+3}+(y+6)\sqrt{x+10}=y^2+4x \end{matrix}\right.\]

[Haru Atsuko]

.

Bài viết đã được chỉnh sửa nội dung bởi Haru Atsuko: 04-05-2017 - 14:26

[Minhhuong3107]

$\sqrt[5]{6}\int_{4}^{6}$ $\int_{2}^{6}$             $n \to 3\int_{2}^6{}$

[Zaraki]

$\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1.0cm,y=1.0cm] \clip(4.22,-2.86) rectangle (13.12,4.98); \draw(8.34,0.2) circle (2.330321866180721cm); \draw (6.86,-1.6)-- (9.827822560606734,-1.5935395251149667); \draw (8.334927274150267,2.5303163449309705)-- (6.86,-1.6); \draw (8.334927274150267,2.5303163449309705)-- (9.827822560606734,-1.5935395251149667); \draw (8.334927274150267,2.5303163449309705)-- (8.345072725849732,-2.1303163449309706); \draw (6.035459992649993,-0.1456810011025011)-- (8.345072725849732,-2.1303163449309706); \draw [domain=4.22:13.12] plot(\x,{(-17.62190491273828--2.3096127331997396*\x)/1.9846353438284694}); \draw (7.290242190121254,-0.3951701881975841)-- (7.725725721359615,-1.5981154536142386); \draw (8.770410805388625,1.327371079514322)-- (7.725725721359615,-1.5981154536142386); \draw(7.290242190121254,-0.3951701881975841) circle (1.2793448391923807cm); \draw(8.770410805388625,1.327371079514322) circle (3.1064188996832454cm); \draw (6.035459992649993,-0.1456810011025011)-- (6.86,-1.6); \draw (6.86,-1.6)-- (8.345072725849732,-2.1303163449309706); \draw (8.345072725849732,-2.1303163449309706)-- (9.827822560606734,-1.5935395251149667); \draw (6.035459992649993,-0.1456810011025011)-- (9.827822560606734,-1.5935395251149667); \begin{normalsize} \draw [fill=white] (8.34,0.2) circle (1.5pt); \draw[color=black] (8.44,0.41) node {$O$}; \draw [fill=white] (6.86,-1.6) circle (1.5pt); \draw[color=black] (6.68,-1.63) node {$B$}; \draw [fill=white] (9.827822560606734,-1.5935395251149667) circle (1.5pt); \draw[color=black] (9.92,-1.67) node {$C$}; \draw [fill=white] (8.334927274150267,2.5303163449309705) circle (1.5pt); \draw[color=black] (8.4,2.83) node {$A$}; \draw [fill=white] (8.345072725849732,-2.1303163449309706) circle (1.5pt); \draw[color=black] (8.36,-2.23) node {$K$}; \draw [fill=white] (6.035459992649993,-0.1456810011025011) circle (1.5pt); \draw[color=black] (5.94,0.07) node {$I$}; \draw [fill=white] (7.725725721359615,-1.5981154536142386) circle (1.5pt); \draw[color=black] (7.78,-1.35) node {$M$}; \draw [fill=white] (6.880592857004804,-0.8718982273583699) circle (1.5pt); \draw [fill=white] (7.290242190121254,-0.3951701881975841) circle (1.5pt); \draw[color=black] (7.12,-0.25) node {$D$}; \draw [fill=white] (8.770410805388625,1.327371079514322) circle (1.5pt); \draw[color=black] (8.96,1.37) node {$E$}; \end{normalsize} \end{tikzpicture}$

Bạn có thể xem tại đây.

[Mr Cooper]

[latex]
[+preamble]
\usepackage{tikz}
[/preamble]
\begin{tikzpicture}[scale=2]
\shade[top color=blue,bottom color=gray!50]
(0,0) parabola (1.5,2.25) |- (0,0);
\draw (1.05cm,2pt) node[above]
{$\displaystyle\int_0^{3/2} \!\!x^2\mathrm{d}x$};

\draw[style=help lines] (0,0) grid (3.9,3.9)
[step=0.25cm] (1,2) grid +(1,1);

\draw[->] (-0.2,0) -- (4,0) node[right] {$x$};
\draw[->] (0,-0.2) -- (0,4) node[above] {$f(x)$};

\foreach \x/\xtext in {1/1, 1.5/1\frac{1}{2}, 2/2, 3/3}
\draw[shift={(\x,0)}] (0pt,2pt) -- (0pt,-2pt) node[below] {$\xtext$};

\foreach \y/\ytext in {1/1, 2/2, 2.25/2\frac{1}{4}, 3/3}
\draw[shift={(0,\y)}] (2pt,0pt) -- (-2pt,0pt) node[left] {$\ytext$};

\draw (-.5,.25) parabola bend (0,0) (2,4) node[below right] {$x^2$};
\end{tikzpicture}
[/latex]

[Mr Cooper]

*** Cannot compile formula:
 \begin{tikzpicture}[scale=2]\shade[top color=blue,bottom color=gray!50](0,0) parabola (1.5,2.25) |- (0,0);\draw (1.05cm,2pt) node[above]{$\displaystyle\int_0^{3/2} \!\!x^2\mathrm{d}x$};\draw[style=help lines] (0,0) grid (3.9,3.9)[step=0.25cm] (1,2) grid +(1,1);\draw[->] (-0.2,0) -- (4,0) node[right] {$x$};\draw[->] (0,-0.2) -- (0,4) node[above] {$f(x)$};\foreach \x/\xtext in {1/1, 1.5/1\frac{1}{2}, 2/2, 3/3}\draw[shift={(\x,0)}] (0pt,2pt) -- (0pt,-2pt) node[below] {$\xtext$};\foreach \y/\ytext in {1/1, 2/2, 2.25/2\frac{1}{4}, 3/3}\draw[shift={(0,\y)}] (2pt,0pt) -- (-2pt,0pt) node[left] {$\ytext$};\draw (-.5,.25) parabola bend (0,0) (2,4) node[below right] {$x^2$};\end{tikzpicture}

*** Error message:
Error: Nothing to show, formula is empty

[THAN DONG TOAN HOC LDK]

$0\leq m\leq \frac{6}{5}, m\neq 1$

[Phongkute]

$x^2.y+x+1<=y$

[Phongkute]

$x^2.y+x+1\ge y$

[Phongkute]

Cho x,y là các số dương thỏa mãn $x^2.y+x+1≤ y$
Tìm GTLN của P=$\frac{x.y}{(x+y)^2}$

Bài viết đã được chỉnh sửa nội dung bởi Phongkute: 26-05-2017 - 13:20

[linhk2]

$^{^{a}}$

[linhk2]

$^{\frac{1}{3}}$

Bài viết đã được chỉnh sửa nội dung bởi linhk2: 03-06-2017 - 10:53

[linhk2]

$\frac{a^{2}}{b+c}$

Bài viết đã được chỉnh sửa nội dung bởi linhk2: 03-06-2017 - 10:52

[MHmath2k1]

$\fn_phv \frac{1}{1+\frac{b}{a}}^{2}$

[MHmath2k1]

[trangdauxanh]

lỡ tắt latex rồi thì sao ạ? Em loay hoay mãi...

[shiroyuki10112002]

$\sqrt{a+b^2}$

Bài viết đã được chỉnh sửa nội dung bởi shiroyuki10112002: 20-07-2017 - 17:50