Latex中文识别texlive中文

添加命令usepackage[UTF8]{ctex}

documentclass{article}
usepackage[UTF8]{ctex}
	itle{My first document}
author{大家好}
date{	oday}
egin{document}
    maketitle
    hello world 
    
    Let $f(x)$ be defined by the formula $f(x)=3x^2+x-1$
end{document}