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输入新命令时出现问题

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输入新命令时出现问题

我有以下代码，用于将公式输入到开始方程中。我使用了 amsmath 包。

\newcommand{\formula}[2]{\begin{equation} #2 \end{equation}}
\formula{z=f(x_0,y_0)+f_x(x_0,y0)(x-x_0)+f_y(x_0,y_0)(y-y_0)}

它在我的程序中不起作用，它说

! TeX capacity exceeded, sorry [input stack size=5000].
\end #1->\csname end#1
                      \endcsname \@checkend {#1}\expandafter \endgroup \if@e...
l.94 \end
         {document}

您是否知道为什么它不起作用？

帖子编辑

\newcommand{\norm}[1]{\lvert \lvert #1 \rvert\rvert}
\newcommand{\formula}[1]{\begin{equation} #1 \end{equation}}
\maketitle
\begin{center}
\textbf{13.8 Maxima and Minima of Functions of Two Variables} \par
Theorem 13.8.6 Page 875 11th Edition
\end{center}
\begin{equation}
D=f_{xx}(x_0,y_0)f_{yy}(x_0,y_0)-f^2_{xy}(x_0,y_0)
\end{equation}
$
\begin{array}{c|c|c|c|c}
f_{xx}(x_0,y_0) & f_{yy}(x_0,y_0) & f^2_{xy}(x_0,y_0) & D & \text{Stationary Point Type} \\
\hline - & - & + & - & \text{ Saddle Point}\\
\hline - & - & + & +& \text{Relative Maximum} \\
\hline - & + & + & -& \text{Saddle Point} \\
\hline +& - & + & - & \text{Saddle Point} \\
\hline + & + & + & -& \text{Saddle Point} \\
\hline +& + & + & +& \text{Relative Minimum}
\end{array}
$
\par
\par
\textbf{Note:} You are subtracting the second term so it is negative ulitmately.
\begin{center}
\textbf{13.7 Tangent Planes and Normal Vectors} \par
Definition 13.7.1
\end{center}
The normal vector is equivalent to the gradient in other words \begin{equation} \vec{n}= \nabla f(x,y,z) \end{equation} The equation of the tangent plane is then the following: \begin{equation}F_x(x_0,y_0,z_0)(x-x_0)+F_y(x_0,y_0,z_0)(y-y_0)+F_z(x_0,y_0,z_0)(z-z_0) \end{equation} \par
13.7.2 Theorem
\formula{z=f(x_0,y_0)+f_x(x_0,y0)(x-x_0)+f_y(x_0,y_0)(y-y_0)}
\end{document}

答案1

\newcommand{\formula}[2]{\begin{equation} #2 \end{equation}}
意味着您将写入\formula{arg 1}{arg 2}，并且arg 2出现在等式中（arg 1并被忽略）。当您随后写入 时\formula{stuff}，TeX 将继续运行，直到找到下一个标记arg 2。

所以你可能想要
\newcommand{\formula}[1]{\begin{equation} #1 \end{equation}}

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