x2-3x+2<0

来源:学生任我发773311con论坛帮助网 编辑:任我发773311con论坛帮 时间:2019/09/26 12:38:58
x2-3x+2<0x2-3x+2<0x2-3x+2<0x2-3x+2<0(x-2)(x-1)1(x-1)(x-2)所以x-1和x-2一正一负因为-1>-2x-1>x-2所以x-1>0且x-2x>1且x

x2-3x+2<0
x2-3x+2<0

x2-3x+2<0
x2-3x+2<0
(x-2) (x-1 ) < 0
1

(x-1)(x-2)<0
所以x-1和x-2一正一负
因为-1>-2
x-1>x-2
所以x-1>0且x-2<0
x>1且x<2
1<>

(x-1)(x-2)<0
所以1<>

(x一1)(x十3)<0,x>1,X<>