求偏导函数。求高人解答。
发布网友
发布时间:2024-09-15 10:06
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热心网友
时间:2024-11-03 03:18
z=u^2lnv
两边对x求偏导数得:
∂z/∂x=2u(-y/x^2)lnv+u^2(1/v)=-2y^2/x^3*ln(x-y)+y^2/(x^2(x-y))
∂z/∂y=2u(1/x)lnv+u^2(-1/v)=2y/x^2*ln(x-y)-y^2/(x^2(x-y))
热心网友
时间:2024-11-03 03:18
az/ax=u^2/v*(av/ax)+2u*lnv*(au/ax)
=y^2/(x^2*(x-y))-2y/x*ln(x-y)*y/x^2
az/zy=u^2/v*(av/ay)+2u*lnv*(au/ay)
=y^2/(x^2*(x-y)*(-1)+2y/x*ln(x-y)*1/x
=-y^2/(x^2*(x-y)+2y/x^2*ln(x-y)