1 . 有下列四个命题:
(1)已知A,B,C,D是空间任意四点,则
;
(2)若两个非零向量
与
满足
,则
;
(3)分别表示空间向量的有向线段所在的直线是异面直线,则这两个向量不是共面向量;
(4)对于空间的任意一点O和不共线的三点A,B,C,若
当
时,(x,y,
),则P,A,B,C四点共面.
其中正确命题的个数是( )
(1)已知A,B,C,D是空间任意四点,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e26118630b1ad0e3746c7ab1985830.png)
(2)若两个非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1070a28cb9cb8553c29747d1993b16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b19f09e31d95863882d960637bdee63d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7612addf7073624b7d0e21a2ced44b2.png)
(3)分别表示空间向量的有向线段所在的直线是异面直线,则这两个向量不是共面向量;
(4)对于空间的任意一点O和不共线的三点A,B,C,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8d49bf33e578b25811e22e26dbf584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd24c686fbaaa68705d654b880481ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/525c1a68848e95e6b419e0bbec3c0957.png)
其中正确命题的个数是( )
A.3 | B.2 | C.1 | D.0 |
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2 . 若向量
,
,
共面,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e938912144c782fb3e95af300eb3e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5708786412d7a989b1d8e1356f045e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df0f25b0b1742d6b0c0d9e42382fa4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
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3 . 已知空间向量
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58d1cd421cdf5fb7baa3fe205853a73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce07fab1fc711a0802656035105acd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead4767424866f1453c464a93b3ca8fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
A.![]() | B.3 | C.![]() | D.2 |
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4 . 在四棱锥
中,底面
为平行四边形,E为
的中点,F为
的中点,
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0f4748c03eee1158c8f4dd1356280b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b76ac232477ac6d4b0a36eded969d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14390e9b6b44472bdc7a131133ab39b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cd14dfc0024459f9d8e594c95c5106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07dcf0b16163e0e0e0c0f248466ee7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d627b9a5b268fe69aa466f7c465c5f3f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
解题方法
5 . 已知
,
,
分别是
三内角
,
,
的对边,则“
”是“
为直角三角形”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35069268e62dbff379b4555d3f7d6016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
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7日内更新
|
579次组卷
|
5卷引用:专题04 解三角形小题常考题型归类-期末考点大串讲(人教B版2019必修第四册)
(已下线)专题04 解三角形小题常考题型归类-期末考点大串讲(人教B版2019必修第四册)浙江省重点中学四校2023-2024学年高一下学期5月联考数学试题 (已下线)第2套 全真模拟卷 (基础)【高一期末复习全真模拟】浙江省台州市温岭市新河中学2023-2024学年高一下学期6月阶段性考试数学试题(已下线)解三角形-综合测试卷B卷
解题方法
6 . 已知实数
满足
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde3da412c997c926ae842ddc107cf35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095354f5d4e5dc28402af7b089ebb2f9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
7 . 已知向量
,且
平面
平面
,若平面
与平面
的夹角的余弦值为
,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c548218e603eb4464bdd1fe4e5bf9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a149e3fbd368c1852d64585e2334a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed43e58b898d683085e39daa0ca7e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() | C.-1或2 | D.![]() |
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2024-06-10更新
|
175次组卷
|
3卷引用:贵州省六盘水市盘州市第一中学2023-2024学年高二上学期期末考试数学试题
名校
8 . 对于变量
,条件![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
,条件![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e482e4b0a8d1eef67ef0066839af65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b9c582302b8768bf5ab8ff5a5a1c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.充要条件 | B.充分不必要条件 | C.必要不充分条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
9 . 全称量词命题、存在量词命题及含量词命题的否定
命题名称 | 命题结构 | 命题简记 | 命题的否定 |
全称量词命题 | 对M中任意一个x, | ||
存在量词命题 | 存在M中的元素x, |
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10 . 已知实数
满足
,则点
的轨迹为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01aab7b1514944e7b349bc3596b8cd9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
A.抛物线 | B.双曲线 | C.一条直线 | D.两条直线 |
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