解题方法
1 . 已知倾斜角为45°的直线
经过抛物线
的焦点
,且与抛物线交于
,
两点,则焦点
的坐标为______ ;线段
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2023-01-05更新
|
287次组卷
|
2卷引用:天津市河北区2022-2023学年高二上学期期末数学试题
解题方法
2 . 如图,在长方体
中,
,
,
与
交于点
,
的中点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/fc342ac1-48a3-43ab-81f6-2bb71cb2651d.png?resizew=182)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值;
(3)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8700c9f9c9e05c0c7a0ef5ba49a456cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/fc342ac1-48a3-43ab-81f6-2bb71cb2651d.png?resizew=182)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7c261740ac2ae26715e1298ca278a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554b3b4c5ce7aca81becc07ed4903736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6684d8fe0d6da7564247e47b948e3997.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f5ce42fe8ea626c297e3b2a2ab95149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6684d8fe0d6da7564247e47b948e3997.png)
您最近一年使用:0次
2023-01-05更新
|
297次组卷
|
2卷引用:天津市河北区2022-2023学年高二上学期期末数学试题
名校
解题方法
3 . 设椭圆
的右顶点为A,上顶点为B.已知椭圆的离心率为
,
.
(1)求椭圆的方程;
(2)设直线l:
与椭圆交于P,Q两点,l与直线AB交于点M,且点P,M均在第四象限.若
,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe2c533dbc23a34518f72f3cb14f330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/704b2a2a5f99225329f7d950d5825f53.png)
(1)求椭圆的方程;
(2)设直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2761aa85c2256bb59665e1d3242dcde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7970dccde65609fdfef617402f9a35e.png)
您最近一年使用:0次
2022-12-15更新
|
1212次组卷
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6卷引用:天津市第二中学2022-2023学年高二上学期12月学情调查数学试题
名校
4 . 已知数列
满足
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45513303aee181de7e73d8eb1cf4c298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2f03f58e3c85de45bd3fd86a8a66f7.png)
A.![]() | B.1 | C.4043 | D.4044 |
您最近一年使用:0次
2022-12-02更新
|
1485次组卷
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6卷引用:天津市第二中学2022-2023学年高二上学期12月学情调查数学试题
天津市第二中学2022-2023学年高二上学期12月学情调查数学试题湖北省武汉市部分重点中学2022-2023学年高二上学期期末联考数学试题广东省揭阳市普宁国贤学校2022-2023学年高二上学期11月月考数学试题(已下线)4.1 数列(练习)-高二数学同步精品课堂(苏教版2019选择性必修第一册)云南省昆明市第一中学高中新课标2022届高三第五次二轮复习检测理科数学试题(已下线)第04讲 数列的通项公式(十六大题型)(讲义)-3
名校
5 . 已知
是等差数列
的前n项和,若
,
,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa561fcad46eaf8d841efa58fe9a8af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49889abfa24edb862e45a44329a904f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e096395cf359ca14d80bef3ea199ba.png)
您最近一年使用:0次
2022-12-01更新
|
1221次组卷
|
3卷引用:天津市第二中学2022-2023学年高二上学期12月学情调查数学试题
6 . 已知直线
的方程为
,圆
的方程为
.
(1)若
时,直线
与圆
交于
、
两点,求弦
的长:
(2)若直线
与圆
相切,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b361021c983aae88e8e6cb870a475b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad59ac87ecff20a9aec7255b61cd8039.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
解题方法
7 . 已知椭圆
的长轴长是
,短轴长是
,过右焦点
的直线
与椭圆相交于
两点.
(1)求椭圆的方程及离心率;
(2)若直线
的倾斜角为
,求线段
的长;
(3)若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
(1)求椭圆的方程及离心率;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba693ccc34401cd4df1eaf534bbc2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
8 . 已知向量
.
(1)求
;
(2)求
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31cc00a13f8951a0d9817cad28a1302.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b714d7bdaaa6635fe254d8ade3b884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9c88190fb57e877047c8cdc3b564ba.png)
您最近一年使用:0次
解题方法
9 . 在棱长为2的正方体
中,E为
的中点,以D为原点,
所在直线分别为x轴,y轴,z轴,建立如图所示的空间直角坐标系,则点
到直线
的距离为______________ ;点D到平面
的距离为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1dd635cae84319a62ed68af58901b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4755dc59cb5a03cd39879bc80fdbb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/d7b7e7d0-e0c0-4021-9f95-e2229f766a1f.png?resizew=197)
您最近一年使用:0次
解题方法
10 . 如图,三棱柱
中,
平面
,M是
的中点,N是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/6cc108c5-67f5-4515-a0dd-a7d22ec90a18.png?resizew=165)
(1)求证:
∥平面
;
(2)求直线
与平面
所成角的正弦值;
(3)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d01df0ce084ed80ec9cb1a7a97e71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/6cc108c5-67f5-4515-a0dd-a7d22ec90a18.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee16c91119c5601a7c93a6642c95e7f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
2022-11-16更新
|
541次组卷
|
3卷引用:天津市河北区2022-2023学年高二上学期期中数学试题