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1 . 已知非空集合A,B满足以下两个条件:①
,
;②若
,则
.满足以上条件的集合A的所有可能个数有______ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bfc343735f42124f572243eef276d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab23352fbe6c2145ebb4c2d4a132742.png)
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2 . 某班统计考试成绩,数学得90分以上的有25人;语文得90分以上的有21人;两科中至少有一科在90分以上的有38人.则两科都在90分以上的人数为______ .
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3 . 已知
,集合
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e4b9219f02f2c00edeac55f6790a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 集合
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
_________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d9b9173dc033f726d151df1b1cd4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef825a5dd000a293386d95d88a5fc529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21292cf8f2bc47fa7ae2f1b800967f46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
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5 . 集合
,
,则
的真子集个数________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a4454e0d2129a2c9d0b6761eb39394e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77eed7aa4959ec041bc368b09dfe6ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
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6 . 已知集合
,
,且
,则实数
的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e496b645560cd7ab5256399bb18ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e482c023ae002567286f6fb93bd7ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7f14bf7f60fe19b509223284455f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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7 . 集合
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c42800801e5b700c664320a58f5b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e27e8864c94ca6f54722830cc2990bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bdcc96d957534e0996776f010b5758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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8 . 已知集合
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce16549ec85032a1e7c9af7b89e13b3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
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9 .
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220f7ad8156a315dea0d7d10aaabc66a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
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10 . 已知集合
,其中
.
①集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0d2a6750330ebe1cf1b3a65825d0e6.png)
_______________ ;
②若
,都有
或
,则c的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abeb837962544605c14c9338047b8ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686b332872c51b433befe65fbe773380.png)
①集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0d2a6750330ebe1cf1b3a65825d0e6.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
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