ChinaTeXMathFAQ

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......\dots\cdots\vdots\ddots7.()[]|{}\f\gjj\|\left\right\[f(x,y,z)=3y^2z\left(3+\frac{7x+5}{1+y^2}\right).\]f(x;y;z)=3y2z3+7x+51+y2‹:\left\right\[\left.\frac{du}{dx}\right|_{x=0}\]dudxx=08.\begin{eqnarray*}\cos2\theta&=&\cos^2\theta-\sin^2\theta\\&=&2\cos^2\theta-1.\end{eqnarray*}cos2=cos2sin2=2cos21:ChinaTEXMathFAQjChinaTEX..3....I(LA)TEX.ChinaTEXDocumentationWorkshop&*LATEXLATEX*9.\[\left(\begin{array}{ccc}a&b&c\\d&e&f\\g&h&i\end{array}\right)\](abcdefghi)\[\chi(\lambda)=\left|\begin{array}{ccc}\lambda-a&-b&-c\\-d&\lambda-e&-f\\-g&-h&\lambda-i\end{array}\right|.\]()=abcdefghi:10.\[\frac{du}{dt}\mbox{}\frac{d^2u}{dx^2}\]dudtd2udx2\[\frac{\partialu}{\partialt}=h^2\left(\frac{\partial^2u}{\partialx^2}+\frac{\partial^2u}{\partialy^2}+\frac{\partial^2u}{\partialz^2}\right)\]@u@t=h2@2u@x2+@2u@y2+@2u@z2‹\[\lim_{x\to+\infty},\inf_{xs},\sup_K\]limx!+1;infxs;supK\[\lim_{x\to0}\frac{3x^2+7x^3}{x^2+5x^4}=3.\]limx!03x2+7x3x2+5x4=3:\[\sum_{k=1}^nk^2=\frac{1}{2}n(n+1).\]n∑k=1k2=12n(n+1):ChinaTEXMathFAQjChinaTEX..4....I(LA)TEX.ChinaTEXDocumentationWorkshop\[\int_a^bf(x)\,dx.\]∫baf(x)dx:d