已知四棱锥
的底面是平行四边形,平面
与直线
分别交于点
且
,点
在直线
上,
为
的中点,且直线
平面
.
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740935022125056/2740983534608384/STEM/5292c65b-0958-48e9-908e-1637874a81a6.png?resizew=231)
(Ⅰ)设
,试用基底
表示向量
;
(Ⅱ)证明,对所有满足条件的平面
,点
都落在某一条长为
的线段上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28121a595e617a54a3432bf5119b8773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92005d391c3ccebd6d768f7ea5e1fb63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fc107c4b33d6dd648b396156494ea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558432772e71c0909a2764efbecaccf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/817a419430d9951cbdb89b657b21bcf0.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/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740935022125056/2740983534608384/STEM/5292c65b-0958-48e9-908e-1637874a81a6.png?resizew=231)
(Ⅰ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78904648e568d4c11939f8dc08d8d666.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43208c7885ae4d4763c7d7f5df84fe1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8434200b36130e0fdf8f0b673a3bb09.png)
(Ⅱ)证明,对所有满足条件的平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f6345f54cdba8572baeb130df483b7.png)
20-21高一下·浙江·期末 查看更多[4]
(已下线)【新东方】在线数学173高一下(已下线)专题8.6 空间向量及其运算和空间位置关系(练)- 2022年高考数学一轮复习讲练测(新教材新高考)(已下线)1.1空间向量及其运算(专题强化卷)-2021-2022学年高二数学课堂精选(人教版A版2019选择性必修第一册)新疆维吾尔自治区喀什第六中学2022-2023学年高二上学期10月期中考试数学试题
更新时间:2021-06-12 00:08:11
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在四棱锥
中,底面
为正方形,平面
平面
,
,点
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/ec7c89c0-e5ca-4af2-a5d3-199ed0fc6ff1.png?resizew=189)
(1)求证:
;
(2)若
,求平面
与平面
夹角的正弦值.
![](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/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e85c423fce51e48617382a3abbca40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac4ee9a98647379757a6f643fb73438.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/ec7c89c0-e5ca-4af2-a5d3-199ed0fc6ff1.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efbae661c332b33d48a9dcde4790d938.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc461ecaceb4374b4628f95081c3b14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437bc0b5b7815c77b4956f194fc6ef52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图所示,平行六面体
的底面是菱形,
,
,
,
,
,设
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/16a7e249-18c1-4be7-980f-a399ec067c78.png?resizew=170)
(1)试用
,
,
表示
,
;
(2)求MN的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945b939951db8b1b82b4a0562d227676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861c64c5bbc7c51ff4adac9bb1719a90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d6da3ae5b58962734400dfb4f56bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e984585ddf28c039219afcebf229de7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8780f5b68f8907a57c1c2f96233a78c5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/16a7e249-18c1-4be7-980f-a399ec067c78.png?resizew=170)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6d728b430549f00bb9c0a7bf8bf7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8962b0c33df0302e741501c1491bf643.png)
(2)求MN的长度.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图所示,在棱长为1的正方体
,中,E、F分别是棱AB、BC上的动点,且
,其中
,以O为原点建立空间直角坐标系
.
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963746883035136/2973011563823104/STEM/591017ba-739d-42c4-a580-8727bb0e412f.png?resizew=177)
(1)求证:
;
(2)若
、E、F、
四点共面,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95628327dc58037e5368f4404c05ec39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582fca0c1348fbbf733909680affa238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e46371f310e03a153a1698aad9d4c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963746883035136/2973011563823104/STEM/591017ba-739d-42c4-a580-8727bb0e412f.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03022e8d9e2d2f962c6baa39463c6714.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d392affdb93684623a795a9c03a14fa2.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在长方体
中,E,M分别是
,
的中点,
,
.
(1)若在线段
上存在一点
,使
∥平面
,试确定N的位置;
(2)在(1)的条件下,试确定直线
与平面
的交点F的位置,并求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d64fc81c857b124268609a8beb77b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/30/a8a9ea23-944e-42ad-9170-9a1d548ccc58.png?resizew=187)
(1)若在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)在(1)的条件下,试确定直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193b5b41994c2a4dfa5bb0bc984061cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
您最近一年使用:0次