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markdown公式练习¶
\[
\frac{\partial y}{\partial x}
\]
\[
\nabla f(x)
\]
\[
\frac{abc}{xyz}
\]
\[
\tan(at-n\pi)
\]
\[
\begin{aligned}
f(x)&=2x+1 \\
&=2+1 \\
&=3
\end{aligned}
\]
\[
x+y=z
\tag{10}
\]
\[
%公式自动会编号 删除其中的 后面会重新排序，不用手动重新修改
\begin{equation}
a^2+b^2=c^2
\end{equation}
\]
\[
\lim_{n \to +\infty} \frac{1}{n(n+1)}
\quad
and
\quad
\int_0^{\frac{\pi}{2}}{\sin}^2{x}\,{\rm d}x
\]
\[
\log_{x+y}{z}
\]
\[\sqrt[n]{x+y}\]
\[\sqrt{2}\]
\[
\sum_{i=1}^{n}{\frac{1}{i^2}}
\]
\[
\int_0^1{x^2}\,{\rm d}x
%式子照打 最后dx处稍作修改，加一个小空格，并把d变直
\]
\[
\left\{
\begin{aligned}
2x-1&=y \\
2y-1&=3x \\
\end{aligned}
\right.
\]
\[
\begin{aligned}
\end{aligned}
\]
\[
\frac{\rm{d}}{\rm{d}x}(\cos(x^3+1))=-3x^2\sin(x^3+1)
\]