x/y=ln(xy)求隐函数y的导数dy/dx,

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x/y=ln(xy)求隐函数y的导数dy/dx,
x/y=ln(xy)求隐函数y的导数dy/dx,

x/y=ln(xy)求隐函数y的导数dy/dx,
x=yln(xy),等式两端对x求导,1=dy/dx+y[1/ln(xy)][y+x(dy/dx)]=dy/dx+y/ln(xy)+xdy/dx,整理得
(dy/dx)(1+x)=1-y/ln(xy),即dy/dx={[ln(xy)-y]/[(1+x)ln(xy)]