名校
1 . 已知直线
和圆
,下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ee822d6dfae4f659088ba299b5953c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b4bcb812c997db47214cb52c905f99.png)
A.不论![]() ![]() ![]() |
B.不论![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.若直线![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
名校
2 . 已知某校为学生提供了四种体育锻炼的方式:跑步、跳绳、排球、篮球.规定学生体锻必须且只能从上述四种体锻方式中选择一种.已知学生甲不选篮球,学生乙只选排球,学生丙、丁选择哪种方式体锻都可以,这四名学生体锻后,恰好选择了其中的三种体锻方式,那么他们选择体锻方式的可能情况有( )种.
A.7 | B.12 | C.19 | D.26 |
您最近一年使用:0次
2021-12-31更新
|
664次组卷
|
2卷引用:重庆市第八中学2022届高三上学期高考适应性月考(四)数学试题
3 . 数列
满足
,
,
是
的前
项和,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b5245eea94925f7321e9fbf667b1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1875bd4e0010ebed22cd44aec5b2f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() ![]() |
B.![]() |
C.![]() |
D.对于两个正整数![]() ![]() ![]() ![]() |
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解题方法
4 . 如图:空间直角坐标系
中,已知点
,
,
,
,则下列选项正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/12/24/2879455618596864/2881493713772544/STEM/6c281d3b230f4f539ee9e3dbaa38f184.png?resizew=227)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2d3e07da3e72fb878008abf6d46a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c310b4ab43387c6929ac681a8059d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7120946fe673568d0199ee69336c3369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887920eaaa3fe529509f18c22e7f17fb.png)
![](https://img.xkw.com/dksih/QBM/2021/12/24/2879455618596864/2881493713772544/STEM/6c281d3b230f4f539ee9e3dbaa38f184.png?resizew=227)
A.设点![]() ![]() ![]() ![]() ![]() ![]() |
B.三棱锥![]() ![]() |
C.设点![]() ![]() ![]() ![]() ![]() ![]() ![]() |
D.设点![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2021-12-27更新
|
417次组卷
|
3卷引用:重庆市缙云教育联盟2021-2022学年高二上学期12月月考数学试题
名校
解题方法
5 . 写一个函数,满足函数值域为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
_______________ .(答案不唯一,写出一个符合题意的即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
您最近一年使用:0次
名校
6 . 正四面体
的棱长为
,如图甲,
,
,
分别是
,
,
上的点,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828e73ec5e00f95aa11ff74c703a5c1.png)
底面
,半径为
的球
在三棱台
内部且与底面
和平面
都相切,记三棱锥
的体积为
.如图乙,将正四面体
倒置后,
,
,
分别是
,
,
上的点,且平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52173c8cc44246823c2bee21a783b731.png)
底面
,此时球
内切于三棱锥
,记三棱台
的体积为
,若三棱锥
的体积
,则球
的表面积是( )
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874545992491008/2877541439864832/STEM/b7499d57-8a4c-4623-b85d-2da64028c840.png?resizew=433)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed0325097927b92a6458bfbb0667b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828e73ec5e00f95aa11ff74c703a5c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650e67cda90719380879ecf85e63e711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828e73ec5e00f95aa11ff74c703a5c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10669424815a8b3079ce56f784de9aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52173c8cc44246823c2bee21a783b731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63eaf642c5fad08149a81fbb0dbde0f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f033488c5ffc4037406033e490cb51f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de2e0a7723ba400d57ae3930d8be892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874545992491008/2877541439864832/STEM/b7499d57-8a4c-4623-b85d-2da64028c840.png?resizew=433)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 下列命题正确的是( )
A.直线![]() ![]() |
B.两平行直线![]() ![]() ![]() |
C.过点![]() ![]() ![]() |
D.圆![]() ![]() ![]() |
您最近一年使用:0次
解题方法
8 . 2020年某地爆发了新冠疫情,检疫人员对某高风险小区居民进行检测.
(1)若假设A,B,C,D,E,F,G,H,I,J这10人的检测样本中有1份呈阳性,且这10人中恰有1人感染,请设计一种最多只需做4次检测,就能确定哪一位居民被感染的方案,并写出设计步骤;
(2)若A,B为确诊患者,C,D为密切接触者,且C被A或B感染的概率均为
,D被A或B或C感染的概率均为
(D没有途径感染C),则C,D中受感染的人数X作为一个随机变量,求X的分布列及数学期望.
(1)若假设A,B,C,D,E,F,G,H,I,J这10人的检测样本中有1份呈阳性,且这10人中恰有1人感染,请设计一种最多只需做4次检测,就能确定哪一位居民被感染的方案,并写出设计步骤;
(2)若A,B为确诊患者,C,D为密切接触者,且C被A或B感染的概率均为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
您最近一年使用:0次
2021-12-22更新
|
551次组卷
|
3卷引用:重庆市部分学校2022届高三上学期12月考试数学试题
9 . 一个完美均匀且灵活的平衡链被它的两端悬挂,且只受重力的影响,这个链子形成的曲线形状被称为悬链线(如图所示).选择适当的坐标系后,悬链线对应的函数近似是一个双曲余弦函数,其解析式可以为
,其中
,
是常数.
![](https://img.xkw.com/dksih/QBM/2021/12/21/2877568091652096/2878007398121472/STEM/7994d95b5b48460ba6954a3cae574b5f.png?resizew=257)
(1)当
时,判断
的奇偶性;
(2)当
时,若
的最小值为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49757d6d62b9c313b11aafd537475845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://img.xkw.com/dksih/QBM/2021/12/21/2877568091652096/2878007398121472/STEM/7994d95b5b48460ba6954a3cae574b5f.png?resizew=257)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0b38c8ec2cf6a3b999dd2f851179cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1c15263cbb460891a4af6a9c693060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/007a2c5b15ecfabfb01e8d2c0f5793bd.png)
您最近一年使用:0次
2021-12-22更新
|
275次组卷
|
2卷引用:重庆市部分学校2022届高三上学期12月考试数学试题
解题方法
10 . 已知
,
则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fe3f68cbbcc907caab5083d08df301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6451d5aeb6dc4d759e6bfe91583ab96d.png)
A.直线![]() ![]() | B.点![]() ![]() |
C.点![]() ![]() | D.直线![]() ![]() |
您最近一年使用:0次
2021-12-22更新
|
359次组卷
|
2卷引用:重庆市九校联盟2021-2022学年高二上学期12月联考数学试题