9-10高二·江西新余·阶段练习
1 . 两个集合
与
之差记作“
” 定义为
且
,
若集合
,
,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f4bcaec7926363d8f77c6e773920d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b998f1e3675e0fa3b790c416a751af63.png)
若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32357c20c811c759a81590166e4cdf3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c988a18554b46fa6b441d26e36c1f75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5eeaa30850a2dd1abcb46208ac8b6a2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知集合
,
,则
是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f3b8f803e98aaaa49d9105efec2062e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91472859bc56cd6171dddfb730c4c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5c53724ad51415d716fcfb24bb80a9.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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9-10高三·江西·阶段练习
3 . 已知命题P:不等式lg[x(1-x)+1]>0的解集为{x|0<x<1};命题Q:在三角形ABC中,∠A>∠B是cos2(+)<cos2(+)成立的必要而非充分条件,则( )
A.P真Q假 | B.P且Q为真 | C.P或Q为假 | D.P假Q真 |
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