名校
解题方法
1 . 下列命题是真命题的是( )
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
名校
解题方法
2 . 给出以下四个结论,其中正确结论是( )
A.若函数![]() ![]() ![]() ![]() |
B.函数![]() |
C.若![]() ![]() ![]() |
D.设![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-09-07更新
|
646次组卷
|
2卷引用:辽宁省大连市第八中学2021-2022学年高一上学期12月月考数学试题
名校
3 . 已知
,
,
,
,直线
.
(1)求直线AB与直线l夹角的余弦值;
(2)若
为锐角,求t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c928a84ae85ae403a181802337c5e145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/466e8c438084aef563c6aaeff3bca583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13444c3f459dc56ffab2639bdee54170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/483b8d9c1b6be9a684bc1b835df88955.png)
(1)求直线AB与直线l夹角的余弦值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b18ee599d9e222f6893fe40a1b4406a.png)
您最近一年使用:0次
名校
4 . 已知
是直线,
是平面,(1)若
,
,则
;(2)若
,
,则
.若(1)成立,则
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
________ ;若(2)成立,则
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
________ .注:两空均填写以下所有符合题意的序号:①均是直线;②一个是直线,一个是平面;③均是平面.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165a501b2e6a3acc46212e59a166c053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed78ea04659678011a0e4564cb781a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c975c77f5da0af6133de88df1fa9a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188cca35515f2cb4b4eb90befea2f7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6882d87bf496872b993e5edcd476df4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c975c77f5da0af6133de88df1fa9a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
名校
解题方法
5 . 下列各选项中,正确的是( )
A.在空间四边形ABCD中,AC与BD一定异面 |
B.![]() ![]() ![]() ![]() ![]() |
C.在直平行六面体![]() ![]() ![]() |
D.在四棱锥![]() |
您最近一年使用:0次
名校
6 . 下列选项中,错误的是( )
A.若存在实数![]() ![]() ![]() ![]() |
B.若![]() ![]() |
C.若![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2023-01-19更新
|
875次组卷
|
4卷引用:辽宁省辽南协作体2021-2022学年高二上学期期初校际联考数学试题
名校
解题方法
7 . 在正三棱柱
中,D是侧棱
上一点,E是侧棱
上一点,若线段
的最小值是
﹐且其内部存在一个内切球(与该棱柱的所有面均相切),则该棱柱的外接球表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9e96ffad10076d4f967886164c1891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbff61fe9d4e93d7cc338489d1c99c40.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-01-19更新
|
460次组卷
|
3卷引用:辽宁省辽南协作体2021-2022学年高二上学期期初校际联考数学试题
辽宁省辽南协作体2021-2022学年高二上学期期初校际联考数学试题河南省洛阳市洛宁县第一高级中学2023-2024学年高三上学期第一次月考数学试题(已下线)重难点突破01 玩转外接球、内切球、棱切球(二十三大题型)-4
名校
8 . 我们知道
时,
恒成立;
时,
,
时,
,某数学研究小组欲研究
时,
与
的大小关系,小组成员经过分析得出结论,存在
,当
时,
,当
时,
,为更准确地估计
,该小组查到如下相关数据:
,
,
,
,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5582e5ebf27f9346d5374ee176b6e3c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfb5839c14229e395f6a5a8cb8ab33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95da96f7112cca3c640a3a7edf223bc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52347b46141a7adade55a1a919e046c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3251e4953e484b89487eb8b329e467c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03deca7ddcd6add46570f28ff872945a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5582e5ebf27f9346d5374ee176b6e3c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66db91bb3be9e2b6ad567774e3699758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c5a05a11f731194a845e68a0479ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad9089327ea4a333751026e15027bb9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467fca1b464a9d9a4d4b5f8f8e4da402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a5a5b79f13e3d8a426e9c6974abe21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff1500430bd225edb002a32814ea3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368763128d1ad0ffad5d859fef834d0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ac320f471b22ebb0e78b94fb6df85c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2508a80b3b7d4c4826dfdef13950f116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11198f63da16a19f6046cc1c2da5da8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/917720ec2a2e6ea717ea9acfa47e7eec.png)
A.![]() ![]() ![]() ![]() |
B.![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
名校
9 . 若数列
满足
,则称
是“紧密数列”.若
,2,3,
是“紧密数列”,且
,
,
,
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad3c395d93268b7213c311f6f0940a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d78af7d9cc1760c70c517984fdc583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693ca42a80bd3d661fc5de6b5df2e8a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8aa3e510f891053e546b003d70eec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55b58f3f154dc5acafe10e3878cacb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0748c346ed88f98e424de8edf278325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2022-12-03更新
|
253次组卷
|
2卷引用:辽宁省丹东市凤城一中2020-2021学年高二下学期4月月考数学试题
名校
解题方法
10 . 如图,在三棱锥
中,
平面
,垂足为点O( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/8f79b338-852e-4989-817e-80eb8ed71fc4.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/8f79b338-852e-4989-817e-80eb8ed71fc4.png?resizew=161)
A.若![]() ![]() |
B.若该三棱锥的外接球的球心在![]() ![]() |
C.“![]() ![]() |
D.“![]() ![]() |
您最近一年使用:0次