解题方法
1 . 若
为奇函数,当
时,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2b74d89854116e411c089d053df053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9a515a9ae776e61e026ca846d0d809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7420ca82461997311e684cc23caf9d5e.png)
A.![]() | B.1 | C.3 | D.![]() |
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名校
2 . 已知
为正方体
的棱
的中点,平面
过点
且与
垂直,且
与直线
相交于点
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
A.直线![]() ![]() |
B.![]() ![]() |
C.直线![]() ![]() ![]() |
D.平面![]() ![]() |
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2卷引用:辽宁省丹东市2021届高三二模数学试题
解题方法
3 . 已知
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29610a3415c1e795d35979a5a9ff69f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b1d796863ebfdbfe06f5b13488ea7e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ba370a3912d1a983146af9c7f9c950.png)
A.![]() | B.![]() | C.5 | D.10 |
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4 . 已知双曲线
:
的离心率为
,
,
分别为
的左右焦点,点
在
上,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe294e939b9fb81256d7218a773b5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec85f29c0860b57a8f0cf8098c13a97e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02006cd01542a61c5911387c7447736.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 设集合
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a43c02f814ba22f162bbbe83737215b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e502eff0c1fe80b2a546ea4af17a9755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7b51138d9effa8eb5d72d5b2c9bfee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21cc993247bded6954ca1119c90ddb8.png)
A.![]() | B.![]() | C.![]() | D.∅ |
您最近一年使用:0次
解题方法
6 . 在复平面内,
为坐标原点,复数
,
对应的点都在单位圆
上,则
的实部为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18c6df52ffa68d6b8baa8b74b35f31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
7 . 设数列
的前
项和
(
为常数),则下列命题中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903e9a1f7d443f0d408ad5b754342d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
A.若![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
2021-05-21更新
|
550次组卷
|
3卷引用:辽宁省丹东市2021届高三二模数学试题
辽宁省丹东市2021届高三二模数学试题广东省惠来县第一中学2021届高三下学期第六次阶段考试数学试题(已下线)4.3.2 等比数列的通项公式(1)-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)
8 . 设
,函数
在
上是减函数.
(1)求
;
(2)比较
,
,
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18cb981d6dba18d01d27fc034c089339.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d364bce4d97527305dd7e50d5d83c7c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
(2)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3682b0689f91dc88354151ef84f723a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e38fffbc7ab9882480f4faa72390e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0de67a5a63a0f53fe034bd24da39f0.png)
您最近一年使用:0次
2021-05-18更新
|
436次组卷
|
2卷引用:辽宁省丹东市2021届高三二模数学试题
名校
9 . 在
的二项展开式中,仅有第4项的二项式系数最大,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706bafd8a19fe0fb38685cecf6c7fdca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
A.5 | B.6 | C.7 | D.8 |
您最近一年使用:0次
2021-05-18更新
|
1164次组卷
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2卷引用:辽宁省丹东市2021届高三二模数学试题
名校
解题方法
10 . 中药藿香产业化种植已经成为某贫困山区农民脱贫攻坚的重要产业之一,藿香在环境温度为15~28℃时生长旺盛,环境温度高于28℃或低于15℃时生长缓慢或停止.藿香的株高
(单位:
)与生长期内环境温度
(单位:℃)中的
有关,现收集了13组藿香生长期内环境温度中的
和株高
(
,2,…,13)观测数据,得到如图所示的
散点图.
![](https://img.xkw.com/dksih/QBM/2021/5/10/2718155646902272/2723954720669696/STEM/331bc23f4f3d430d934768a2e656e1f0.png?resizew=199)
根据散点图判断,可以利用模型
或
建立
关于
的回归方程,令
,
,统计处理得到一些数据:
的线性相关系数
,
的线性相关系数
.
,
,
,
,
,
,
,
,
.用线性相关系数说明上面的两种模型哪种适宜作为
关于
的回归方程,并求这种模型的回归方程,由此预测这种中药藿香在生长期内的环境温度为20℃时的株高(株高精确到1).
附:对于一组数据
(
,2,3,…,
),其回归直线
的斜率和截距的最小二乘估计分别为
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9edda2ac2ed9a50429414bf3c6894561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de122ae929b1acaff321dec137622ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef046c85a536174bec951a53d9f60b33.png)
![](https://img.xkw.com/dksih/QBM/2021/5/10/2718155646902272/2723954720669696/STEM/331bc23f4f3d430d934768a2e656e1f0.png?resizew=199)
根据散点图判断,可以利用模型
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c305c245407e2152ef4c582dc2d3f9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8901c469ca9b12a490dbb827c906215b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d52b5c676c90b24db90d977c829193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea905439d2e55ab4dcaa355eca72cbf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94896f1fbc4ee55ea54c406c86465d82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fc07a4332d3cdb0eebeed209b0c621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b076de9d69f62ebb7e437cf57299a9c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963b8975e1163d137d90234ba7011320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a510c5901fa54420a059f17bdb55a0ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fa6673784b66eac7303f4a49e47464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51a51e71c1865a9a125bd98c6200cfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a36f6c95ded3ea8b40114b80963a747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65694c5228eb100a5bca8924081a2c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5267d8906946ea7ae52a9ecdde54acbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bce44272128e1bfbd9a2d968f020279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b93c3678905d9e96931d787249b1f49c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb079921a200dc1bc4865f59ce336b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
附:对于一组数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4077c5cfa706b4e898a1983328a3c7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0943f70585435955d528325e51ef013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f38451023eaad524140b4ba939c375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815e2869dc16e2ae7a7e1911e3afc8c3.png)
您最近一年使用:0次
2021-05-18更新
|
989次组卷
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5卷引用:辽宁省丹东市2021届高三二模数学试题
辽宁省丹东市2021届高三二模数学试题吉林省延边第二中学2020-2021学年高二下学期第二次考试月考数学(理)试题(已下线)考点46 随机变量及其分布-备战2022年高考数学(理)一轮复习考点帮江西省新余市第一中学2021-2022学高二年级下学期开学考试数学(理)试题江西省赣州市赣县第三中学2021-2022学年高二5月月考数学(文)试题