解题方法
1 . 已知
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac88aec5a9f58b915b428e9b5e6b9061.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685a9287922fff593bdca50ed8bcf684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d703454ab4a9782ca2fe8c55c17dc5.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 集合
的一个真子集可以为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e72451662b3790686096d22a4eb118.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 已知集合
,
,若
,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30afb3daca2f6f1af823dda96596d15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8b46a41c3aa61cdb09f56ae1fa16aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a45ed519f02f2df64476227f0cae74.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
4 . 已知集合
,
,且
,则实数n的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c969d41a860a02582dd3fce1077d29c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f2527bade16e5461e2406353503224b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
A.0 | B.1 | C.0或![]() | D.![]() |
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5 . 设集合
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce240043bb6d7e24a09954f7c72a14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a125967005f5bbef8d18cd1f4931a218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6292bcbd5a0d3ca09c6bb89caebf8278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef06e1d37ef0fe7f20068ab74cbadd2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
6 . 已知
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1264ff32a7d08c98adabe7323b57882f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcb2752cb3a3ac840fec5a1259eb4d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb61eaa47f7e587d07a22ef379118df7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 某地区上年度电价为0.8元
,年用电量为
,本年度计划将电价下降到
之间,而用户期望电价为
.经测算下调电价后的新增用电量,和实际电价与用户的期望电价的差成反比(比例系数为
).该地区的电力成本价为
.已知
,为保证电力部门的收益比上年至少增长
,则最低的电价可定为______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2472b568635ece209ceca8a364dcee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18faf3c8c90bed9d7e05185700649945.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7f923d9917d21abe6d927aa236ea8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6eff8dca8aafa1e9fc1ff3399760a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a938e812e061ef959d4124a1aa161540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f04297a04eaa4bdd15b705f3c405a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9fd62e62750b30638385031737f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8418b4c9a43352b8fb34a05266ee21ff.png)
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8 . 已知函数
,
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4a29fd093745c5c8602450709d66b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9ce4e82eec17b60cc0cf34f0394e42.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.对于![]() ![]() ![]() |
D.对于![]() ![]() ![]() |
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解题方法
9 . 已知
是奇函数,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/349ce4b8c5aa1ccc4a2ab1bd5a7b3f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b64998782e0a053755cf13588d988aa.png)
A.1 | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
名校
解题方法
10 . 已知
是奇函数,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02ac352b6a0a494050f8c4ad820187a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8f282990d53ae464d1501a9d13dcc96.png)
A.-1 | B.1 | C.-2 | D.2 |
您最近一年使用:0次