(2X+2)/(X-2)<1
(2X+2)/(X-2)-1<0
[(2X+2)-(X-2)]/(X-2)<0
(X+4)/(X-2)<0
两边同时乘以(X-2)^2,不变号
(X+4)(X-2)<0
所以
-4
移项通分
(2x-1)/(x-2)-1<0
(x+1)/(x-2)<0
-1
(2x-4+6)/(x-2)<1
(2x-4)/(x-2)+6/(x-2)<1
2+6/(x-2)<1
6/(x-2)<-1
1/(x-2)<-1/6
-6
(2x+2)(x-2)
(2x+1)(x-2)
(2x+2)/(x-2) -1<0
(2x+2-x+2)/(x-2)<0
(x+4)/(x-2)<0
两边同乘以(x-2)得
(x+4)(x-2)<0
-4