|x-i|

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/18 22:39:04
|x-i|
x)ͬI*҇ l$A%m8#m8##2 52cBPPsA< ->7

|x-i|
|x-i|

|x-i|
|x-i|

x^2+1^2<2
x^2<1
-1

|x-i|<√2<==>√x^2+1<√2
<==>x^2+1<2
<==>x^2<1
<==>-1