(1){x|2<x<5}(2)
∪[2,3]
(1) A∩B={x|2<x<5}.
(2) B={x|a<x<a 2+1}.
①若a=
时,A=
,不存在a使B
A;
②若a>
时,2≤a≤3;③若a<
时,-1≤a≤-
.
故a的取值范围是
∪[2,3].
(1){x|2<x<5}(2)
∪[2,3]
(1) A∩B={x|2<x<5}.
(2) B={x|a<x<a 2+1}.
①若a=
时,A=
,不存在a使B
A;
②若a>
时,2≤a≤3;③若a<
时,-1≤a≤-
.
故a的取值范围是
∪[2,3].