为什么我markdown里的数学公式全崩了？？？

目录

• try a try
• ac is ok

Typecho博客

https://www.diyifanwen.com/fanwen/dangyuanxindetihui/2665516.htm

https://www.diyifanwen.com/fanwen/dangyuanxindetihui/2665516.htm

https://www.diyifanwen.com/fanwen/dangkexindetihui/2661093.htm

https://zhidao.baidu.com/question/585243762.html

try a try

$ \sum_{d|n} \mu(d) = [n==1] $

$ x $

$ \sum_{d|n} \phi(d) = n $

\[\sum_{d|n} \mu(d) = [n==1]
\]

\[\begin{equation}
\sum_{d|n} \phi(d) = n
\end{equation}
\]

---

\[\[\begin{aligned}
x ={}& a+b+c+{} \\
&d+e+f+g
\end{aligned}\]
\]

ac is ok

#include<bits/stdc++.h>
int main() {
      std::cout << "Hello!\n";
}

$ \sum_{k=1}^{log_{4}{N}}{\frac{3}{4^{k}}}Nk $

\[\begin{cases}
3x + 5y + z \\
7x - 2y + 4z \\
-6x + 3y + 2z
\end{cases}
\]

\[\begin{array}
\overline{a+b+c} \\
\underline{a+b+c} \\
\overleftarrow{a+b} \\
\underleftarrow{a+b} \\
\underleftrightarrow{a+b} \\
\vec x = \vec{AB} \\
\overbrace {a+b}^\text{a,b} \\
a+\rlap{\overbrace{\phantom{b+c+d}}^m}b+\underbrace{c+d+e}_n+f
\end{array}
\]

\[\begin{array}
\sum_{d|n} \mu(d) = [n==1]
\end{array}
\]