如何添加如图所示的大支架？

Question

我怎样才能制作出如下图中这样的括号：

\documentclass[tikz,border=3.14mm]{standalone}

\begin{equation}
\label{eq:1}
P(k)= (\sum_{min}^{max}\frac{{K \choose k}{N-K \choose n-k}} {{N \choose n}})^j
\end{equation}
with following parameters:
\begin{itemize}
    \item $N = 2^{256}$ is the output range of SHA-256
    \item $K=target(p)$ is the target value with a probability $p$ at a particular transverse time.
    \item $n=3.5\times10^6$ is the number of hashes per time $t=90 sec$. This value is estimated in python.
\end{itemize}
\end{document}

Answer 1

要使括号适应其所括的内容，可以使用\left(和\right)。（其他选项已在Joule V 的评论。）我还想鼓励您在文本模式下编写min和，为和max声明一个数学运算符以用于二项式。您可能还想使用以便排版。您的文档未编译，因为您忘记了和 \end{document}`。target\binomsiunitx90 sec\begin{document}

\documentclass{article}
\usepackage{amsmath,siunitx}
\DeclareMathOperator{\target}{target}
\begin{document}
\begin{equation}
\label{eq:1}
P(k)= \left(\sum_{\textup{min}}^{\textup{max}}
\frac{\binom{K}{k}\binom{N-K}{n-k}}{\binom{N}{n}}\right)^j
\end{equation}
with the following parameters:
\begin{itemize}
    \item $N = 2^{256}$ is the output range of SHA-256.
    \item $K=\target(p)$ is the target value with a probability $p$ at a
    particular transverse time.
    \item $n=3.5\times10^6$ is the number of hashes per time $t=\SI{90}{\sec}$. This value is estimated in python.
\end{itemize}
\end{document}