设函数y=y(x)由方程e^y+xy-e^x=0确定,求y"(0)
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e^y+xy-e^x=0x=0e^y(0) -1=0y(0) = 0e^y+xy-e^x=0e^y.y' +xy'+y -e^x =0y'(e^y+x) = (e^x -y)y' = (e^x -y)/(e^y+x)y'(0) =(1 -y(0) )/(e^y(0)+0)=0y' = (e^x -y)/(e^y+x)y'' =[(e^y+x)(e^x -y')-(e^x -y)(e^y.y' + ...
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