设f(x,y)=ln[x(1+2/y)],则∂f/∂y|x=1,y=1等于()
设f(x,y)=ln[x(1+2/y)],则∂f/∂y|x=1,y=1等于()
A、-(2/3)
B、2/3
C、-(3/2)
D、3/2
【正确答案】:A
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