设F(x,y)=xy+2lnx+3ny-1≡0,则y'等于()
A.-{y(xy+2)/[x(xy+3)]} B.-{x(xy+2)/[y(xy+3)]} C.-{x(xy+3)/[y(xy+2)]} D.-{y(xy+3)/[x(xy+2)]}正确答案A
设F(x,y)=xy+2lnx+3ny-1≡0,则y'等于()
A.-{y(xy+2)/[x(xy+3)]} B.-{x(xy+2)/[y(xy+3)]} C.-{x(xy+3)/[y(xy+2)]} D.-{y(xy+3)/[x(xy+2)]}正确答案A