About the presentation of matrix

[applechu]

Hi:
I have a problem about the matrix,
i try the following tex commands:
$A=\begin{ bmatrix } 1 & 2 \\ 3 & 6 \end{ bmatrix }$

and it can not show the matrix, I don't know what is the problem, since the
code style seems right. And another problem is I try to use Daum Equation Editor
to edit the math equation, but the problem is if I add $ and $ surround the code
paste from Daum Equation Editor, it can not show the result I want.
it will show the original codes without any compile. Is any possible solution for that,
thanks a lot.

 

[micromass]

Hi:
I have a problem about the matrix,
i try the following tex commands:
$A=\begin{ bmatrix } 1 & 2 \\ 3 & 6 \end{ bmatrix }$

and it can not show the matrix, I don't know what is the problem, since the
code style seems right. And another problem is I try to use Daum Equation Editor
to edit the math equation, but the problem is if I add $ and $ surround the code
paste from Daum Equation Editor, it can not show the result I want.
it will show the original codes without any compile. Is any possible solution for that,
thanks a lot.

Here is a LaTeX guide: https://www.physicsforums.com/showthread.php?t=546968

In your case, you should not type spaces before and after bmatrix. It should be

##A=\begin{bmatrix} 1 & 2 \\ 3 & 6 \end{bmatrix}##

which gives

$A=\begin{bmatrix} 1 & 2 \\ 3 & 6 \end{bmatrix}$

 

[applechu]

Thanks