已知集合
,
,其中
.
(1)若
,
,求实数a的取值范围;
(2)若
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3469f810c11944841619b7b1b8721b07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfdbbb9e6744dc8d16b1fe9e3ba7b6ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f675eefeacfddb5098894bbe2fcd0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f37f2f2b7851376587cc6061ed50c35.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
19-20高一上·浙江宁波·期中 查看更多[2]
更新时间:2019-11-30 18:51:22
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】设
,集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c227f6074a84533142bceebf68396e.png)
(1)若
,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c227f6074a84533142bceebf68396e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3159480021c92ef04b57ded6a6deab.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐2】已知集合
,其中
为常数,且
.
(1)若
中至少有一个元素,求
的取值范围;
(2)若
中至多有一个元素,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076dcc7c79841e1fb5bc638b836d45dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
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适中
(0.65)
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【推荐1】已知函数
.
(1)求不等式
的解集;
(2)设函数
,若对任意
,都存在
,使得
成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106d16034100f58a043f025e4af74569.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abdaffa9c15517afe6d7ba6488f88f67.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7d9fd4c8f7de4396bd944aced44f85b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f9d255ca420fa2486b11fcb7763b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33890c6b0bf167514d44139d9dca0154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐2】设集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492699f4efbf6f5291e04d58bec1d992.png)
或
,分别求出满足下列条件的实数
的取值范围:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492699f4efbf6f5291e04d58bec1d992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d92d6172989ab8b2c6836100ca592d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b18d49782c83ea51587859d3c2bc216d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d50619b779c1056602f46b2a95e90.png)
您最近一年使用:0次