已知*A={x∈R||x|≤2},B={x∈R|x≤1},则 (A) (B)[1,2] ...
问题详情：
已知*A = {x∈R| |x|≤2}, B= {x∈R| x≤1}, 则![已知*A={x∈R||x|≤2},B={x∈R|x≤1},则 (A) (B)[1,2] ...](https://i3.guoyuzhan.com/8d564b1d35eee34807/8c464006/805644/d705135c60baaf401592cb.gif "已知*A={x∈R||x|≤2},B={x∈R|x≤1},则 (A) (B)[1,2] ..."){kind=small}
(A) ![已知*A={x∈R||x|≤2},B={x∈R|x≤1},则 (A) (B)[1,2] ... 第2张](https://i1.guoyuzhan.com/8d564b1d35eee34807/8c464006/805644/d705135c60baaf401592c8.gif "已知*A={x∈R||x|≤2},B={x∈R|x≤1},则 (A) (B)[1,2] ... 第2张"){kind=small}
(B) [1,2] (C) [－2,2] (D) [－2,1]
【回答】
【*】D
【解析】因为![已知*A={x∈R||x|≤2},B={x∈R|x≤1},则 (A) (B)[1,2] ... 第3张](https://i2.guoyuzhan.com/8d564b1d35eee34807/8c464006/805644/d705135c60baaf40088acb.gif "已知*A={x∈R||x|≤2},B={x∈R|x≤1},则 (A) (B)[1,2] ... 第3张"){kind=small}
,所以![已知*A={x∈R||x|≤2},B={x∈R|x≤1},则 (A) (B)[1,2] ... 第4张](https://i3.guoyuzhan.com/8d564b1d35eee34807/8c464006/805644/d705135c60baaf40088ac8.gif "已知*A={x∈R||x|≤2},B={x∈R|x≤1},则 (A) (B)[1,2] ... 第4张"){kind=small}
，选D.
知识点：高考试题
题型：选择题
问题详情：
已知*A = {x∈R| |x|≤2}, B= {x∈R| x≤1}, 则
(A) (B) [1,2] (C) [－2,2] (D) [－2,1]
【回答】
【*】D
【解析】因为,所以，选D.
知识点：高考试题
题型：选择题
