If xy=x+y and y> 2,which of the following must be true about A.x=_数学解答

If xy=x+y and y> 2,which of the following must be true about
A.x=y
B.x=0
C.x=1
D.0

人气：441 ℃　时间：2020-05-21 02:44:07

解答

xy-x-y+1=1,即（x-1)(y-1)=1,选E