1 . 如图,在四棱锥
中,底面
为平行四边形,
,
.且
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8a94dcf4-e97a-4021-aa14-d3ada1380c18.png?resizew=226)
(1)证明:平面
平面
;
(2)若
为
的中点,且
,求二面角
的大小
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdfd547c5cb12488099645da9bce79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8a94dcf4-e97a-4021-aa14-d3ada1380c18.png?resizew=226)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000204a310efd5b340dda949856fe953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b4e098c6194f55462b24f552f5967.png)
您最近一年使用:0次
2019-05-05更新
|
437次组卷
|
3卷引用:山西省忻州市第一中学2018-2019学年高二下学期期中考试数学(理)试题
2 . 如图,四棱锥
,
,
,
,
为等边三角形,平面
平面
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/3e297d5d-59ab-4e40-8391-1ad89f0091b2.png?resizew=177)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2d5ab801f2a84b78139b0ea2c5032b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/3e297d5d-59ab-4e40-8391-1ad89f0091b2.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14ddcfd8985d6ef923063a301e2bc5ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
2019-05-02更新
|
1630次组卷
|
8卷引用:山西省大同市2019-2020学期高三上学期第一次联合考试数学(理)试题
3 . 如图,正方体
的棱长为4,点
在棱
上,且
,
是面
内的正方形,且
,
是面
内的动点,且
到平面
的距离等于线段
的长,则线段
长度的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f4dd459597ebe5554b1effd7d22544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d0058da08e2f68829aa0551357075e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e086d253dedbb9dc3781e935a5dc64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/e55303f3-5737-4f48-85d4-e3b42599e55f.png?resizew=183)
您最近一年使用:0次
2019-04-29更新
|
664次组卷
|
3卷引用:【市级联考】山西省太原市2019届高三模拟试题(一)理科数学试题
名校
4 . 已知抛物线
经过点
,直线
与抛物线交于相异两点
,
,若
的内切圆圆心为
,则直线
的斜率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fe3f68cbbcc907caab5083d08df301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/62c7b00bbc388a57080f7dab4aca8286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f826c5485fa22997ce01501ba0cec58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2019-04-29更新
|
1355次组卷
|
8卷引用:【市级联考】山西省晋城市2019届高三第二次模拟考试数学(文)(B卷)试题
名校
5 . 以下说法错误的是
A.命题“若![]() ![]() ![]() ![]() |
B.“![]() ![]() |
C.若命题![]() ![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2019-04-28更新
|
1784次组卷
|
6卷引用:山西省忻州市原平市范亭中学2018-2019学年高二下学期期末数学试题
名校
6 . 已知椭圆
的离心率为
,其中左焦点
.
(1)求出椭圆
的方程;
(2)若直线
与曲线
交于不同的
两点,且线段
的中点
在曲线
上,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434249d6640b0c1a712d215cf8b83d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030700126fb012f13935f57780b96677.png)
(1)求出椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50687388994292af0d481d205780b42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2019-04-28更新
|
394次组卷
|
2卷引用:山西省忻州市原平市范亭中学2018-2019学年高二下学期期末数学试题
名校
7 . 设命题
:
;命题
:
,若
是
的充分不必要条件,则实数
的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a551a88ac426439803f564a3bbee04a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee432db65a845b0804a14327597ad0e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2019-04-20更新
|
1294次组卷
|
5卷引用:山西省临汾市洪洞县第一中学2020届高三上学期期中数学(理)试题
名校
8 . 设命题
:实数
满足
,其中
, 命题
:实数
满足
.
(1)若
且
为真,求实数
的取值范围;
(2)若
是
的必要不充分条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6048ff0be99a96698fc535d887840f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3016743d429ac8ce43b9893ca89378.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2019-04-17更新
|
1008次组卷
|
4卷引用:山西省太原市实验中学2019-2020学年高二12月月考数学(文)试题
名校
9 . 已知命题“
∈[1,2],
”是真命题,则实数a的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a613e10df815bdd1c3e580ea4dce6535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fa73ce08d333b41fe6d3bdd5e82ced.png)
您最近一年使用:0次
2019-04-17更新
|
970次组卷
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5卷引用:【市级联考】山西省晋中市2018-2019学年高二上学期期末调研测试数学(理)试题
【市级联考】山西省晋中市2018-2019学年高二上学期期末调研测试数学(理)试题四川省射洪中学校2022-2023学年高二下学期期中考试数学(理)试题(已下线)高一上学期期中数学试卷(提高篇)-举一反三系列四川省射洪中学校2022-2023学年高二下学期期中文科数学试题(已下线)专题03 高一上期中真题精选-期中考点大串讲(人教A版2019必修第一册)
名校
10 . 如图,在棱锥P-
中,底面
为菱形,且∠DAB=60°,平面
平面
,点E为BC中点,点F满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/072f860e-232c-4fdd-b49c-499493644415.png?resizew=184)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ae7c0340ac5eac087a3f5b01372774.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/072f860e-232c-4fdd-b49c-499493644415.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb178784aa857d4d4683e650273f054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ceb3c582b074d63bd7f8538b18bdb5.png)
您最近一年使用:0次
2019-04-13更新
|
1035次组卷
|
3卷引用:【省级联考】山西省2019届高三考前适应测试(湛江一模同)(A卷)数学理试题