熱心網友

[0.25,0.75]

熱心網友

兩集應是交的吧,不過答案對了。

熱心網友

0<=(x-0.25)<=10<=(x+0.25)<=1則0.25<=x<=1.25并上-0.25<=x<=0.75即0.25<=x<=0.75