作者sosick (钱钱)
看板Math
标题[微积] 三变数问题
时间Thu May 12 22:21:38 2011
If the equation sin(x+y)+sin(y+z)=1 defines z implicitly
as a differentiable function of x and y , evaluate (Ø^2 z÷ØyØx)
Ø=partial的符号
拜托了 卡好久!!
答案很怪...
[cos^2(x+y)sin(y+z)+cos^2(y+z)sin(x+y)]÷cos^3(y+z)
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※ 编辑: sosick 来自: 114.27.34.92 (05/12 23:25)
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