LaTex 测试

众所皆知,LaTex 是个好东西,本站自然也引进了它。

下面来个小小的测试。

\(\frac{2333}{6666}\)

\(f(x_1,x_x,\ldots,x_n) = x_1^2 + x_2^2 + \cdots + x_n^2 \)

\(\sum_{i=1}^n a_i=0\)

\(f(x)=x^{x^x}\)

\([f(x,y,z) = 3y^2 z \left( 3 + \frac{7x+5}{1 + y^2} \right).]\)

\(\frac{du}{dt} and \frac{d^2 u}{dx^2}\)

\([ \frac{\partial u}{\partial t}
= h^2 \left( \frac{\partial^2 u}{\partial x^2}
+ \frac{\partial^2 u}{\partial y^2}
+ \frac{\partial^2 u}{\partial z^2}\right)]\)

\([ \lim_{x \to 0} \frac{3x^2 +7x^3}{x^2 +5x^4} = 3.]\)

\([ \int_{x^2 + y^2 \leq R^2} f(x,y)\,dx\,dy
= \int_{\theta=0}^{2\pi} \int_{r=0}^R
f(r\cos\theta,r\sin\theta) r\,dr\,d\theta.]\)

\([ \int_0^R \frac{2x\,dx}{1+x^2} = \log(1+R^2).]\)

\([ \int !!! \int !!! \int_V
\left| \psi(\mathbf{r},t) \right|^2\,dx\,dy\,dz]\)