[問題] 陣列中的數學式開頭用中括號出問題
如題,我在texwoks中輸入
\documentclass[12pt,a4paper]{article}
\usepackage{amsmath}
\usepackage{color}
\usepackage{fontspec}
\usepackage{xunicode}
\usepackage{xltxtra}
\usepackage{xeCJK}
\setCJKmainfont{cwTeX 明體}
\XeTeXlinebreaklocale "zh"
\XeTeXlinebreakskip = 0pt plus 1.5pt
\renewcommand{\baselinestretch}{1.35}
\setlength{\textwidth}{155mm}
\setlength{\textheight}{250mm}
\setlength{\voffset}{-20mm}
\setlength{\hoffset}{-5mm}
\begin{document}
\begin{center}
{\CJKfamily{cwhbu}微積分~~習題6.3.3}
\end{center}
{\it Sol}:
\begin{eqnarray}
[\frac{\partial F}{\partial t}+\frac{\partial F}{\partial y}\frac{\partial
f}{\partial t}]\frac{dy}{dx}&=&\frac{\partial F}{\partial t}\frac{\partial
f}{\partial x}-\frac{\partial F}{\partial x}\frac{\partial f}{\partial t}
\end{eqnarray}
\end{document}
(其中有些不必要的就沒打出來)
編譯時一直出現
! Missing number, treated as zero.
<to be read again>
\protect
l.61 ...{\partial y}\frac{\partial f}{\partial t}]
\frac{dy}{dx}&=&\frac{\par...
但若是我把文中的
\frac{dy}{dx}改放到式子前頭那又可以編譯了
請問開頭要放中括號的方法如何?
謝謝
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