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楼主 |
发表于 2010-6-15 00:17:07
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$\frac{x}{y}
$\int_{a}^{b}f(x)dx
$\frac{\partial^2f(x,y) }{\partial x^2}+\frac{\partial^2f(x,y)}{\partial y^2}=0
$\frac{x}{y}
$\int_{a}^{b}f(x)dx
$\frac{\partial^2f(x,y) }{\partial x^2}+\frac{\partial^2f(x,y)}{\partial y^2}=0$
$\frac{x}{y}
$\int_{a}^{b}f(x)dx
$\frac{\partial^2f(x,y) }{\partial x^2}+\frac{\partial^2f(x,y)}{\partial y^2}=0
$\frac{x}{y}
$\int_{a}^{b}f(x)dx
$\frac{\partial^2f(x,y) }{\partial x^2}+\frac{\partial^2f(x,y)}{\partial y^2}=0$ |
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