设
表示集合
中元素的个数,定义
已知
,
,若
,则实数
的取值范围为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824dc88e8fa0803c32405e964f884c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaaba8b981401c3e58c954bf66f275fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4180daea91165cbfc8756812e90964df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0872deed0df0d6cf7d2231fd298dc33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbaa27bace17e206f10da0da0c871786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2016-12-03 20:37:44
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相似题推荐
填空题-单空题
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适中
(0.65)
名校
解题方法
【推荐1】函数
的图像与直线
有且仅有两个不同的交点,则实数
的取值范围是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/110542b008eccf569b89d799b2a7078b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead6a3dbd03539ef5e0807be57bb1e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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填空题-双空题
|
适中
(0.65)
名校
【推荐2】已知函数
,
,函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4633de9335d15d7685bdecb007a3678c.png)
(1)当实数
时,
有__________ 个不同零点;
(2)若
图象经过4个象限,则实数
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80c5b9dc0c1ba77d8f5a806333cceb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d33e14afc48b1109ee5d8c31d37c349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4633de9335d15d7685bdecb007a3678c.png)
(1)当实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02f266bd253738e315e84231235f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5a90aeba435af22d6bcdb7b91650b8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5a90aeba435af22d6bcdb7b91650b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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填空题-双空题
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适中
(0.65)
【推荐1】已知集合
是集合
的非空真子集,把集合
中的各元素之和记为
,则满足
的集合
的个数为______ ;
的所有不同取值的个数为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a7d1d98321f6cfb9f93daa0fcc1f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928441297e887330350a46dd2b40841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/face73a89e03b51aba9db3fb4b932f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928441297e887330350a46dd2b40841.png)
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填空题-单空题
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适中
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【推荐2】设
是一个非空集合,集合
是集合
的若干个子集所组成的新集合,即
且
,其中
表示集合
中元素的个数,若满足:
(1)
,
;
(2)对于
中的任意两个元素
,
,其交集
;
(3)对于
中的任意两个元素
,
,其并集
;
则称
是集合
上的一个拓扑结构.则下列说法正确的是________ .(写出所有正确说法的序号)
①集合
是集合
上的一个拓扑结构;
②集合
是集合
上的一个拓扑结构;
③集合
是集合
上的一个拓扑结构;
④集合
上仅有3个拓扑结构且分别为
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57178ca59ce636b842c01522e27f63cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5608a4053306006d628cb0be066f7082.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c1a314e85f1da82472ee3cc086c8b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a837165ca03f9e4ea8964979c95e3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2afc0935375c7cf0308b51cec471391.png)
(2)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/096b1ece1dcd29c59a46a4b3e02cb548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5031a3a951c4a1d1c5e9f80a5e26513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07518e2599d50a7d2424b064be016ee4.png)
(3)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/096b1ece1dcd29c59a46a4b3e02cb548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5031a3a951c4a1d1c5e9f80a5e26513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22bb9cb63710b690db1a953a0c7bd664.png)
则称
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
①集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419af69356218a1034bb00adc08903f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86a10eaa25bea651fea8bb8427c4a12.png)
②集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5db65e04cdc1fd4993e6327f049da8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86a10eaa25bea651fea8bb8427c4a12.png)
③集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe24ffeb1a13a941ef91bd5aa43e7195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bf4032eb5a9ba68131b15182aa3491.png)
④集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298385ae5d53312a7d92be9f87c50e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828436db0e62cee14917c51697e67fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6addb4806cd1dd3ae0fb8dc7bed566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fecf241ac33196d497ad8fec84fb9c4.png)
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