Latex 方程组

作者：不正经 | 2024-03-15 01:47:15

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latex 方程组

注意{amsmath}包的引入

1. 不标号方程组

\usepackage{amsmath}

$$
    \begin{cases}
        l_{11}y_{1} = 1 \\
        l_{21}y_{1} + l_{22}y_{2} = 0 \\ 
        l_{31}y_{1} + l_{32}y_{2} + l_{33}y_{3} = 0 \\
        l_{41}y_{1} + l_ {42}y_{2} + l_{43}y_{3} + l_{44}y_{4} = 0
    \end{cases}
$$
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or:

\usepackage{amsmath}

\begin{equation*}
     \begin{cases}
         l_{11}y_{1} = 1 \\
         l_{21}y_{1} + l_{22}y_{2} = 0 \\ 
         l_{31}y_{1} + l_{32}y_{2} + l_{33}y_{3} = 0 \\
         l_{41}y_{1} + l_ {42}y_{2} + l_{43}y_{3} + l_{44}y_{4} = 0
     \end{cases}
 \end{equation*}
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{\begin{cases} l_{11} y_{1} = 1 \\ l_{21} y_{1} + l_{22} y_{2} = 0 \\ l_{31} y_{1} + l_{32} y_{2} + l_{33} y_{3} = 0 \\ l_{41} y_{1} + l_{42} y_{2} + l_{43} y_{3} + l_{44} y_{4} = 0 \end{cases}

$\begin{cases} l_{11}y_{1} = 1 \\ l_{21}y_{1} + l_{22}y_{2} = 0 \\ l_{31}y_{1} + l_{32}y_{2} + l_{33}y_{3} = 0 \\ l_{41}y_{1} + l_ {42}y_{2} + l_{43}y_{3} + l_{44}y_{4} = 0 \end{cases}$

⎩ ⎪ ⎪ ⎪ ⎨ ⎪ ⎪ ⎪ ⎧ l_{11} y_{1} = 1 l_{21} y_{1} + l_{22} y_{2} = 0 l_{31} y_{1} + l_{32} y_{2} + l_{33} y_{3} = 0 l_{41} y_{1} + l_{42} y_{2} + l_{43} y_{3} + l_{44} y_{4} = 0

2. 标号方程组

(1)方程组整体标号

\usepackage{amsmath}

\begin{equation}
    \begin{cases}
        l_{11}y_{1} = 1 \\
        l_{21}y_{1} + l_{22}y_{2} = 0 \\ 
        l_{31}y_{1} + l_{32}y_{2} + l_{33}y_{3} = 0 \\
        l_{41}y_{1} + l_ {42}y_{2} + l_{43}y_{3} + l_{44}y_{4} = 0
     \end{cases}
\end{equation}
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在这里插入图片描述

(2)方程组中的每一行方程都标号

\usepackage{cases}

\begin{numcases}{}
    l_{11}y_{1} = 1 \\
    l_{21}y_{1} + l_{22}y_{2} = 0 \\ 
    l_{31}y_{1} + l_{32}y_{2} + l_{33}y_{3} = 0 \\
    l_{41}y_{1} + l_ {42}y_{2} + l_{43}y_{3} + l_{44}y_{4} = 0
\end{numcases}
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在这里插入图片描述

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