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求偏导数

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hjnk900 Posted 2015-11-2 11:19 |Read mode
函数 f:R^3→R^3
Snip20151102_28.png

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战巡 Posted 2015-11-2 13:18
回复 1# hjnk900

这不基础题么?

易求
\[x=\frac{1}{2}\ln(\frac{u+v}{1+e^{2w}})+w\]
\[\frac{\partial x}{\partial u}=\frac{1}{2(u+v)}=\frac{1}{2(e^{2x}+e^{2y})}\]
\[\frac{\partial x}{\partial v}=\frac{1}{2(u+v)}=\frac{1}{2(e^{2x}+e^{2y})}\]
\[\frac{\partial x}{\partial w}=\frac{1}{1+e^{2w}}=\frac{1}{1+e^{2(x-y)}}\]

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 Author| hjnk900 Posted 2015-11-2 13:34
回复 2# 战巡

懂了 多谢!!!

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