名校
1 . 已知三棱柱
的侧棱垂直于底面,
,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/3c8c19ec-920a-4a27-8a82-cc19f13e8c88.png?resizew=179)
(1)求证:
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/3c8c19ec-920a-4a27-8a82-cc19f13e8c88.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e98e7edbeab52b0aa5d66396ca46124.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
您最近一年使用:0次
2020-01-06更新
|
1094次组卷
|
10卷引用:广西壮族自治区百色市田东中学2019-2020学年高二上学期期中数学(理)试题
广西壮族自治区百色市田东中学2019-2020学年高二上学期期中数学(理)试题山东省枣庄市第八中学(东校区)2020-2021学年高二9月月考数学试题辽宁省大连市瓦房店市2020-2021学年高二上学期期中数学试题(已下线)专题1.3 空间向量的应用(B卷提升篇)-2020-2021学年高二数学选择性必修第一册同步单元AB卷(新教材人教A版,浙江专用)(已下线)专题03 空间向量的应用-2020-2021学年高中数学新教材人教A版选择性必修配套提升训练人教B版(2019) 选修第一册 过关检测 第一章 1.2.2 空间中的平面与空间向量广东省梅州市兴宁市叶塘中学2021-2022学年高二上学期期中数学试题(已下线)1.2.2 空间中的平面与空间向量河南省许昌市禹州市北大公学禹州国际学校2022-2023学年高二上学期9月月考数学试题(已下线)第05讲 空间向量及其应用 (高频考点—精讲)-2
名校
2 . 用数学归纳法证明“
”时,从“
到
”时,左边应添加的式子是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10aec07a081df94eb9a53fe292fada61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7ca2b3e8061384501f668e59696a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-19更新
|
307次组卷
|
5卷引用:浙江省杭州市学军中学2017-2018学年高二下学期期中数学试题
3 . 已知直线
:
,
.
证明:直线
恒过定点;
设
是坐标原点,
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4585f848fafa9d9e72ebddac20d07e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc9aa334c8a364cbc597127d60b2b51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add5a0c3d79985e90d92c17a11373fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2020-01-30更新
|
241次组卷
|
2卷引用:浙江省绍兴市2019-2020学年高二上学期期末数学试题
名校
4 . 用数学归纳法证明不等式
的过程中由n=k递推到n=k+1时不等式左边应添加的项为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e8e42b162cd19ec28324380c84fd2b0.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2020-01-29更新
|
248次组卷
|
3卷引用:江西省赣州市十五县(市)2019-2020学年高二下学期期中联考数学(理)试题
解题方法
5 . 如图,在四棱锥
中,
是以
为斜边的等腰直角三角形,底面
为直角梯形,
,
,
,
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2020/2/9/2395196111912960/2396097695547392/STEM/25b7e2b884e24ca3bbcb1ab5689d1ded.png?resizew=240)
(1)证明:
平面
;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4ab7e657f01bdfa235f8c4d6681d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3fcba360d97fb1fabd96a7ad9384fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e23e659ea08abb26e70b24ab48c332d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2020/2/9/2395196111912960/2396097695547392/STEM/25b7e2b884e24ca3bbcb1ab5689d1ded.png?resizew=240)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03518223bf0779e4ab4cf376381df98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c911b404bbb8f8d5f1470585fa31ad97.png)
您最近一年使用:0次
6 . 已知等比数列
,
的公比分别为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
.
(1)若
,
,求数列
的前
项和
;
(2)若数列
,满足
,求证:数列
不是等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/c519815a170f37b4e12ff0bbfe8846fa.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebaf2a2590bb84d646957f913d78f6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f738073495765aa968253a51bf70e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2767882820f4ba0defde0e412adb747f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d44ddab6e0c60119be69985ae7fa65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
您最近一年使用:0次
2019-12-19更新
|
206次组卷
|
2卷引用:浙江省绍兴市柯桥区柯桥区教师发展中心2018-2019学年高二下学期期末数学试题
7 . 已知数列
的前
项和为
,且满足
(
N*).
(Ⅰ)求数列
的通项公式;
(Ⅱ)设
,
为数列
的前
项和,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18bb7c1d0429dbea3455011f99013350.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b0aafc603ba02b6702e785b00a5013.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ff75e2ac28473ce7d558b144a0163d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb9022dd239a0b6d27254cec24a1532.png)
您最近一年使用:0次
2019-10-06更新
|
1285次组卷
|
2卷引用:浙江省嘉兴市2019-2020学年高三上学期9月教学测试数学试题
名校
8 . 利用数学归纳法证明“
”时,从“
”变到“
”时,左边应增乘的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d25d2933a34ca3ac10ede7d522be87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7ca2b3e8061384501f668e59696a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
A.2 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
9 . 已知
在平面
外,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/ad465693-fdf0-4293-a22a-e18f6e4922b8.png?resizew=346)
(1)如图1,若
,
,
,求证:
三点共线;
(2)如图2,若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/ad465693-fdf0-4293-a22a-e18f6e4922b8.png?resizew=346)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b203f3a022c25aad67e0e4760aea30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69771723ae0564656e791834495f1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d1d91ced5c15dd6a1285f50df11e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fc107c4b33d6dd648b396156494ea9.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e16cb55efadc7972d48b5b021261dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a546df0d0c8f706bb4383164599e35f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c193eaf4c5ea5a58ed82457cf92c6893.png)
您最近一年使用:0次
10 . 如图所示,
平面
,
为正方形,
,
、
、
分别为
、
、
的中点.
![](https://img.xkw.com/dksih/QBM/2020/2/4/2392012044247040/2392711769374720/STEM/c5c1600f-30ac-4c34-841f-b0ece9462128.png)
(1)求证:直线
平面
;
(2)求直线
与直线
所成角余弦值的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](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/8971433dd59e2541695035b0a0c0fc95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2020/2/4/2392012044247040/2392711769374720/STEM/c5c1600f-30ac-4c34-841f-b0ece9462128.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833e261170a03a9e87ace534a206462e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
您最近一年使用:0次