设F(x,y)=xy+2lnx+3lny-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+3lny-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