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[主观题]
设函数y=y(x)由方程ex+y+cos(xy)=0确定,则dy/dx=__________.
设函数y=y(x)由方程ex+y+cos(xy)=0确定,则dy/dx=__________.
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设函数y=y(x)由方程ex+y+cos(xy)=0确定,则dy/dx=__________.