名校
1 . 给出下列命题:①如果复数
满足
,则复数
在复平面的对应点的轨迹是椭圆.②函数
的图像关于原点对称.③若对任意的
,
恒成立,则数列
是等差数列或等比数列.④存在奇函数
和偶函数
,使得函数
是偶函数.其中真命题的个数是( )个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cadce89f524cb272306f56eef12d797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5efa57a282806b1ecab8764b3d509b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209591cfb9f8271f5ad48d89f214f22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c0bf48663f56bd30662c362a8ebd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b76b91d06b45cb28a70121aaf8a5ec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf893b6d0d1981df0f99542d2428e84d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856dc823250ba17e8e56a1771358edcb.png)
A.1 | B.2 | C.3 | D.4 |
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解题方法
2 . 用符号
表示超过x的最小整数,如
,有下列命题:
①若函数
,则值域为
;
②如果数列
是等差数列,
,那么数列
也是等差数列;
③若
,则方程
有5组解;
④已知向量
,则它们的夹角不可能为钝角.
其中,所有正确命题的序号应是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/728509d4c7d8a305afb7ec4580075109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/144c95a0446bf76a0a5ba65fc62703f0.png)
①若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26163eec3acf38aee721e18ad9a35068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf87d9d48c3de0a5e9f1a70e51a0bef.png)
②如果数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4daffe05bbc10de8449a2a334a92fe.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f27cdc3a9a0f859b639bcb6117fb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602df47af5e61eb48fd601ef4d462039.png)
④已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581b5359582cfa9b559176489822b83a.png)
其中,所有正确命题的序号应是
您最近一年使用:0次
名校
解题方法
3 . 已知无穷数列
,对于任意给定的正整数
,设不等式
对任意
恒成立时
的取值集合为
.
(1)
,求集合
;
(2)若
为等差数列,公差为
,求
;
(3)若对任意
,
,
均为相同的单元素集合,证明:数列
为等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5bb119dc416f7c652da72e216628163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a5e93b5c82f8115328eee9760c2d67d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2ea3d72f46edfb7216c7bc9ab9cf9a.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0dd3ce757a2ad080ece0e34424fb05f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e612765b49f8cdda75bdaaf4f86edd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2ea3d72f46edfb7216c7bc9ab9cf9a.png)
(3)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d438267fddcd02afff8e73c6c3fec8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6b6467f94bbc9916e47bade380929b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2ea3d72f46edfb7216c7bc9ab9cf9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
4 . 若数集M至少含有3个数,且对于其中的任意3个不同数a,b,c(a<b<c),a,b,c都不能成为等差数列,则称M为“α集”.
(1)判断集合{1,2,4,8,⋯,2n}(n∈N*,n≥3)是否是α集?说明理由;
(2)已知k∈N*,k≥3.集合A是集合{1,2,3,⋯,k}的一个子集,设集合B={x+2k﹣1|x∈A},求证:若A是α集,则A∪B也是α集;
(3)设集合
,判断集合C是否是α集,证明你的结论.
(1)判断集合{1,2,4,8,⋯,2n}(n∈N*,n≥3)是否是α集?说明理由;
(2)已知k∈N*,k≥3.集合A是集合{1,2,3,⋯,k}的一个子集,设集合B={x+2k﹣1|x∈A},求证:若A是α集,则A∪B也是α集;
(3)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77f3e417826470991245435ff5a13625.png)
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5 . 设数列
满足,
,
,设
,
.
(1)设
,
,若数列的前四项
、
、
、
满足
,求
;
(2)已知
,
,
,当
,
,
时,判断数列
是否能成等差数列,请说明理由;
(3)设
,
,
,求证:对一切的
,
,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334c7decfe93aeb2feefc83cfc201aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c653177884385ae15b71438aac4e704d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fab51121848ce166035ceab6f4e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55ef34345210312db273ab4981c40f6.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d8579e5cafc7d374d8287c160e8fb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd71c5d9676b8dc5970adfb77971c5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc77c479702c0ba411cb92d32877eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5818ede14d21f6df9ef9c2bfe09286c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac69e6db1df13ed64756b4f391ae9fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9df341fe7cd5fe4733fb5e47c3e750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c876fac94ce67b364063bdc736b56c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e0751d726398c99f8685e782cc3c447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e167b43045b3297248e334c41c621b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac69e6db1df13ed64756b4f391ae9fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a87d281ea5314c8e350cb55a54a14af.png)
您最近一年使用:0次
解题方法
6 . 已知无穷数列
与无穷数列
满足下列条件:①
;②
.记数列
的前
项积为
.
(1)若
,求
;
(2)是否存在
,使得
成等差数列?若存在,请写出一组
;若不存在,请说明理由;
(3)若
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66ba9376feb1cb58b80abd17ab638a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9487a417f7059568539f6f39cce57681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92cf3be68720dfac5c5ebfbdb7e782c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2114a0fe21dc0e5bf831c146ef02b113.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a447e5baee4f7518706498d4aca7553b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3577ef49a3177a78392e720ea4a04.png)
您最近一年使用:0次
2021-05-05更新
|
757次组卷
|
5卷引用:上海市杨浦区2021届高三二模数学试题
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