1 . 如图,在四面体
中,E,F,G,H分别是
,
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263597056/STEM/ce9abe65-c6eb-497e-9ebe-ca02ef97e411.png?resizew=242)
(1)若
,
,求证:
;
(2)设
,O为空间中任意一点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263597056/STEM/ce9abe65-c6eb-497e-9ebe-ca02ef97e411.png?resizew=242)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ee81929c987732fcb379802eeef7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e83ad09855a36ae1e8af3ecbd697db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371ea12c470d1461a464c01636b71f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1696ba7e9fc3f3b9837032c87f7fc8.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,在长方体
中,
,点P满足
,
,
,
,则下列结论正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5e0982f4-47c6-49a7-a16f-f9e7c3f29e2c.png?resizew=190)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f7ad41c55fab640a159a08a12c6b03c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98fc8004f695acbe0b8bf15300515aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcac1e85463a3177f487d896b3d1d24c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c554f9fd0addfa5be4567da76bddf208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbf3f33705250f41ab6762dd8d6cb3d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5e0982f4-47c6-49a7-a16f-f9e7c3f29e2c.png?resizew=190)
A.当![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2021-11-23更新
|
742次组卷
|
4卷引用:山东省烟台市2021-2022学年高二上学期期中数学试题
名校
3 . 一束光线从点
射出,经y轴反射后,与圆
相交,则反射光线所在直线的斜率k的取值范围是_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b2cc0d2f6d3eee9a33db83e0c0830d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69f0bf4c445bc2ef60ced5091d203c8.png)
您最近一年使用:0次
2021-11-23更新
|
594次组卷
|
3卷引用:山东省烟台市2021-2022学年高二上学期期中数学试题
名校
4 . 已知圆
,圆
.
(1)证明:圆
与圆
相交,并求出圆
与圆
的公共弦所在直线l的方程;
(2)过直线l上一点
作圆
的切线,切点分别为A,B,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5875b556a79d46ef314070ae105afe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be5a480e416d8596ff58b076f7939b4.png)
(1)证明:圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)过直线l上一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9d03e2331d9ecda656b2817ca6beef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/493e2a7a79cdd2c6cec58e1d8ce1856c.png)
您最近一年使用:0次
2021-11-23更新
|
407次组卷
|
3卷引用:山东省烟台市2021-2022学年高二上学期期中数学试题
5 . 在直角坐标系
中,线段
,且两个端点M、N分别在x轴和y轴上滑动.
(1)求线段
的中点C的轨迹方程;
(2)若直线
.
①证明直线l与曲线C恒有两个不同交点;
②求直线l被曲线C截得的最短弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e00ad067ceaf3a8c0452e5cd52a506.png)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93baf87568ac0f7a2bef5583fe826a6a.png)
①证明直线l与曲线C恒有两个不同交点;
②求直线l被曲线C截得的最短弦长.
您最近一年使用:0次
2021-11-23更新
|
390次组卷
|
3卷引用:山东省烟台市2021-2022学年高二上学期期中数学试题
6 . 已知圆
,点
,过x轴下方一点Q作圆C的切线与x轴分别交于
,
两点.
(1)过点P的直线l被圆C截得的弦长为
,求直线l的方程;
(2)当
时,求点Q的坐标;
(3)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ee1aeafdfc0aa7ae03e7336c81b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16a939c4bde717d6dcf5ad9780c299fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10c64cc584dde9a132ab54c6981cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6895f2b4db6100ffaa8da3c6e77c7072.png)
(1)过点P的直线l被圆C截得的弦长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3129ddd2ea97fd010b9e0b644225da8c.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0023c9e8e0fec24d3aa77d09b2e4e62.png)
您最近一年使用:0次
名校
7 . 过不同两点
,
的直线l的一个方向向量坐标为
,则实数m的值为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a75fec07048b73391d7524cfc175e06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a52cd977ed779f922d6cb088443363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29343388ca8b33dc98325e65382b38a0.png)
您最近一年使用:0次
2021-11-23更新
|
427次组卷
|
5卷引用:山东省烟台市2021-2022学年高二上学期期中数学试题
8 . 如图,平行六面体
中,M,N分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263810048/STEM/7fb6c4ba35e1473aa4b5fc1ee7d3d037.png?resizew=254)
(1)证明:
平面
;
(2)若四边形
和
均为正方形,
与平面
所成的角为
,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/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263810048/STEM/7fb6c4ba35e1473aa4b5fc1ee7d3d037.png?resizew=254)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bc0c87bc1dbd3963c9f9f9f7cae381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b064937134a3654cdddcc5fc4c0e09.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b064937134a3654cdddcc5fc4c0e09.png)
您最近一年使用:0次
解题方法
9 . 如图,边长为
的菱形
中,
,
分别为
的中点,沿
将
折起,使得平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263957504/STEM/95975d63-ff62-4d30-bf43-1761a7bf9831.png?resizew=610)
(1)证明:平面
平面
;
(2)在棱
上是否存在一点
,使得直线
与平面
所成的角最大?若存在,求
的长度,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df7fc746f8c4801d8f2f0471ba3297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263957504/STEM/95975d63-ff62-4d30-bf43-1761a7bf9831.png?resizew=610)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
您最近一年使用:0次
2021-11-23更新
|
576次组卷
|
2卷引用:山东省烟台市2021-2022学年高二上学期期中数学试题
10 . 我国古代数学名著《九章算术》中记载的“刍甍”(
)是指底面为矩形,顶部只有一条棱的五面体.如图,五面体
是一个刍甍,其中
是正三角形,平面
平面
,
,则直线
与直线
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263351296/STEM/451ad724f2c34507b27ffb2e8be9c342.png?resizew=201)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d48d3e748e3ecd561104e3182502f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5a2e70000cf2f36deaad373a93a9fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2d28f1e7a6b17401c19c34beddcbe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f1a449b9325324c3549ebfe110b745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263351296/STEM/451ad724f2c34507b27ffb2e8be9c342.png?resizew=201)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-11-23更新
|
400次组卷
|
2卷引用:山东省烟台市2021-2022学年高二上学期期中数学试题