(1)解不等式
;
(2)已知
、
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2892d1a7e3c2cf242223080f4913c7df.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90e8d5d7fed033f48270b1ff825fcd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e55efea0b1e368e3cdae6b2be0516d9.png)
更新时间:2018-03-07 08:14:15
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解答题-问答题
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适中
(0.65)
【推荐2】已知下列三个不等式:
①
;
②
;
③
,
以其中两个作为条件,余下一个作为结论,则可组成几个正确命题?
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d5f0d374837655cc286d326305da36.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e128762da7173d52c778f65bfeb936bf.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc05a45acd2f30341e46bbe8091867a6.png)
以其中两个作为条件,余下一个作为结论,则可组成几个正确命题?
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解答题-问答题
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适中
(0.65)
名校
【推荐1】已知集合
,集合
,定义集合
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09bb7c317f907cd7fda5ae49b24f2d41.png)
(1)若
,求
.
(2)若
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc03b1890f9862a6d53166091c5571a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc686be681072f976de4c02ef12d6264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a395870f77df4005141e9e4d72751fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09bb7c317f907cd7fda5ae49b24f2d41.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5461e77bf954fb530969eb80236f674d.png)
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解答题-问答题
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适中
(0.65)
【推荐2】已知
,(
为实常数)
(1)当
时,求不等式
的解集;
(2)若函数
在
中有零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb02cd5e5627f42be3444084a99f8366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4735b605bd31e2d852d58c14923218a.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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适中
(0.65)
名校
解题方法
【推荐3】已知集合
,命题
,满足命题p的元素组成集合B.
(1)当
时,求
;
(2)若“
”是“
”的充分条件,求实数a取值的集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e034743ddeadcfa6c502f77b12b7b7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94774271e3fa9853b41cfacc78837be8.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
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