名校
解题方法
1 . 如图所示,直角梯形ABCD中,AB∥CD,AB⊥AD,AB=AD=4,CD=8.若
=-7
,3
=
,则
·
=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88369a480ff098461307038ceb224e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2cf03ac7a1b0aba75daa3b9f9b5768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00084d7e9dffebe3170447a9d5b382ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701e7b13d7fa13da3f9c480c953a8f37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b8a2a41a8b50e10d68943e3f0f4e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75fc81977aee721525b4c5625f5a097.png)
A.11 | B.10 |
C.-10 | D.-11 |
您最近一年使用:0次
2020-08-21更新
|
265次组卷
|
7卷引用:【市级联考】河南省安阳市2019届高三毕业班第二次模拟考试文科数学试题
【市级联考】河南省安阳市2019届高三毕业班第二次模拟考试文科数学试题河南省天一大联考2018-2019学年高中毕业班阶段性测试(四)文科数学河南省天一大联考2018-2019学年高中毕业班阶段性测试(四)理科数学试题(已下线)专题5.3 平面向量的数量积及应用-2021年高考数学(理)一轮复习-题型全归纳与高效训练突破(已下线)专题5.3 平面向量的数量积及其应用(精练)-2021年高考数学(理)一轮复习学与练(已下线)第19练 平面向量的数量积-2021年高考数学(理)一轮复习小题必刷湖北省孝感市应城市第一高级中学2021-2022学年高三上学期8月热身考试数学试题
名校
解题方法
2 . 如图所示,等边
的边长为
,
,且
.若
为线段
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb88ba49607e90d5b1ddf625e2cf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b947acc328f9561e1d7b78f9bbed9263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ac8ab1725d30ca7eb21d1af5fcb424.png)
A.24 | B.23 | C.22 | D.18 |
您最近一年使用:0次
2020-08-21更新
|
276次组卷
|
6卷引用:【市级联考】河南省焦作市2019届高三年级第四次模拟考试数学(文科)试题
【市级联考】河南省焦作市2019届高三年级第四次模拟考试数学(文科)试题【市级联考】河南省濮阳市2019届高三第二次模拟考试数学(文)试题(已下线)专题5.3 平面向量的数量积及应用-2021年高考数学(理)一轮复习-题型全归纳与高效训练突破(已下线)专题5.3 平面向量的数量积及其应用(精练)-2021年高考数学(理)一轮复习学与练宁夏银川一中2021届高三第五次月考数学(理)试题宁夏银川一中2021届高三第五次月考数学(文)试题
3 . 已知函数
(
),则函数
的零点个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222a3ed790c8c1b74b3881507fa031c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d218992d1942266d7208e476d0c4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eccc263359a80b8c691fed40d8c4691.png)
A.4 | B.5 | C.6 | D.8 |
您最近一年使用:0次
名校
解题方法
4 . 已知等边
的边长为
,
分别为
的中点,将
沿
折起得到四棱锥
.点
为四棱锥
的外接球球面上任意一点,当四棱锥
的体积最大时,
到平面
距离的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a9fc2dda89829fa2c610a8fce86d22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2e74525cb6fcfb9e077c0fd04bcd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2e74525cb6fcfb9e077c0fd04bcd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2e74525cb6fcfb9e077c0fd04bcd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9238757804254960bc40fa9d87065559.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-18更新
|
161次组卷
|
3卷引用:2020届河南省顶级名校高三10月联考数学理科试题
名校
5 . 已知椭圆
的左焦点为
,点
是椭圆
的上顶点,直线
与椭圆
交于
,
两点.若点
到直线
的距离是1,且
不超过6,则椭圆
的离心率的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b584ef432bc03a383ed40ca2e120e45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3adfb8ef95245d7d073de76ceb053a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-09更新
|
853次组卷
|
5卷引用:河南省新乡市2019-2020学年高二上学期期末数学(理科)试题
6 . 设P为椭圆C:
(
)上的动点,
,
分别为椭圆C的左、右焦点,
为
的内心,则直线
与直线
的斜率积( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.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/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8add784e2db2e6a22254cf4d1b1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025a8adfc778705f914bc4bf825774ac.png)
A.非定值,但存在最大值且为![]() | B.是定值且为![]() |
C.非定值,且不存在定值 | D.是定值且为![]() |
您最近一年使用:0次
名校
7 . 已知双曲线
:
的左、右焦点分别为
,
,点
在双曲线
上.若
为钝角三角形,则
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dad0c75ce33673ec4c425896e8619e4.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9df1061c3ba5151ba2f7359acaf356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfe1cad1ce47339827ac5047af4647d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-01-30更新
|
1318次组卷
|
7卷引用:河南省新乡市2019-2020学年高二上学期期末数学(理科)试题
名校
解题方法
8 . 已知函数
,
,曲线
上总存在两点
,
,使曲线
在
两点处的切线互相平行,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5426a7cf1d7a83ab823b6965f0eb4a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b5446ef69198c8dbc59b2c23376300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8198c3b302b3820e86763428eb1e91cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3463ced6030af957f13f9ba05b977c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-04-21更新
|
1130次组卷
|
3卷引用:2019届 河南省名校(鹤壁市高级中学)高三下学期压轴第三次考试数学(理)试题
名校
解题方法
9 . 已知函数
是定义在
上的奇函数,当
时,
,则函数
在
上的所有零点之和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bc2d4bb274bc5d94672ddc7b52dd36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3077b0cfb8a47439afc656af6cc889ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca611ecc17ae62649cd142ea469b13c5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-04-21更新
|
358次组卷
|
2卷引用:2019届 河南省名校(鹤壁市高级中学)高三下学期压轴第三次考试数学(理)试题
解题方法
10 . 已知
是定义在
上的函数,且
均为偶函数,当
时,
,则方程
的所有实根之和(参考数据
)( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da575d45a53427d71df7ad431ebd2193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1376168658dbe7f5b7f4d75fb1db545a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d70266454df40256268b19b055a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffe85cf92112b0d8613368668e7051e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799a2cea0fbceb9720e7d7bba8ae7bdb.png)
A.10 | B.20 | C.8 | D.16 |
您最近一年使用:0次