我们知道,如果集合A
S,那么S的子集A的补集为
,类似的,对于集合A,B,把集合
叫做集合A与B的差集,记作A-B,例如A={1,2,3,4,5},B={4,5,6,7,8},则有A-B={1,2,3},B-A={6,7,8},据此回答下列问题:
(1)S是高三(18)班全体同学的集合,A是高三(18)班全体女生的集合,求S-A及
;
(2)在下列各图中用阴影表示集合A-B;
,那么集合A与B之间具有怎样的关系?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b980d8446f130dfc405c196109e73ea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780e9cb9c1197a4535f113e66ed7eafd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1edcef413699279368278d2e0a0187.png)
(1)S是高三(18)班全体同学的集合,A是高三(18)班全体女生的集合,求S-A及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a04309c1b1165ec5567586a2f2029bb.png)
(2)在下列各图中用阴影表示集合A-B;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a837165ca03f9e4ea8964979c95e3bb.png)
19-20高一·上海·课后作业 查看更多[3]
更新时间:2020-08-16 06:57:52
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【知识点】 集合新定义
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【推荐2】我们知道,如果集合
,那么S的子集A的补集为
.类似地,对于集合A,B,我们把集合
叫做集合A的B的差集,记作
.例如.
,则有
,据此,试回答下列问题:
已知集合
,集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8329b3a2417ebb0cf1a0455a4e8c06c.png)
(1)当
时,求A—B;
(2)若
,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952f1e0ce5bd53a6d5e8bb07ea2da5f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773d695a7f060f90f75deb7f8f9c4189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22336bfc96638c2957c83c02874a83cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b39d3507e40a81bdf01f677173ed337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a349b3ffbca7663e1099e17607de136a.png)
已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa8eb73e843f93dcbea94a3926cf2dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8329b3a2417ebb0cf1a0455a4e8c06c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0d0ad0d33fd9a152a0e407e2afdb84.png)
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