名校
解题方法
1 . 如图,在直三棱柱
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/779992f0-3fd8-45a6-a845-520c38893c99.png?resizew=151)
(1)求证:
;(用向量方法证明)
(2)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/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/779992f0-3fd8-45a6-a845-520c38893c99.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
您最近一年使用:0次
名校
解题方法
2 . 在正四棱柱
中,
,E为
的中点.(用向量的方法证明)
![](https://img.xkw.com/dksih/QBM/2021/12/23/2883777674158080/2929070225489920/STEM/178a81b3-47b8-4fa0-a592-fc7d95a5ce39.png?resizew=152)
(1)求证:
平面
.(用向量的方法证明)
(2)若F为
上的动点,使直线
与平面
所成角的正弦值是
,求BF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f21c7c194c5bc2986a21fd441c81495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2021/12/23/2883777674158080/2929070225489920/STEM/178a81b3-47b8-4fa0-a592-fc7d95a5ce39.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若F为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
您最近一年使用:0次
2022-03-04更新
|
146次组卷
|
2卷引用:吉林省汪清县汪清第四中学2021-2022学年高二上学期第一次阶段检测数学试题
3 . 用综合法或分析法证明:
(1)如果
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da537e5284dc9786845fca39a9ca913.png)
(2)求证
.
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da537e5284dc9786845fca39a9ca913.png)
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c19d94ff48082c1cd213c82c99abf0.png)
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2020-08-17更新
|
384次组卷
|
3卷引用:吉林省延边朝鲜族自治州汪清县汪清第四中学2020-2021学年高二下学期6月月考数学试题
4 . 如图,在直角梯形
中,
,
,
,
,
,点
在
上,且
,将
沿
折起,使得平面
平面
(如图),
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/272baebc-ff8b-4f4c-b334-3e84383a11ee.png?resizew=330)
(1)求证:
平面
;
(2)在线段
上是否存在点
,使得
平面
?若存在,求
的值,并加以证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6037bba27008abc96a6dba99753549ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40560ea08d6cd8c1d4d9661ee6faaa3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/272baebc-ff8b-4f4c-b334-3e84383a11ee.png?resizew=330)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cf187bc2ede965870b90757b495f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5d46cc6946821619e937d12d30dc83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747978ec67fee6ee9eb07d02b80987d7.png)
您最近一年使用:0次
2019-10-30更新
|
714次组卷
|
3卷引用:吉林省延边二中2019-2020学年高一上学期12月月考数学试题
名校
解题方法
5 . 记
上的可导函数
的导函数为
,满足
的数列
称为函数
的“牛顿数列”.已知数列
为函数
的牛顿数列,且数列
满足
.
(1)证明数列
是等比数列并求
;
(2)设数列
的前
项和为
,若不等式
对任意的
恒成立,求t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11e3e7cd27440bbc6a93856c997b8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2b53cd9892f6d174509740afbc69d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8765813233a2c419d2d3bbc56f6670.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/4e3d2f5b3ed3ee8ecce9a586f07244e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
您最近一年使用:0次
解题方法
6 . 已知有两个极值点
.
(1)求实数a的取值范围;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3808f231a23dd0789780f9bbbf93c989.png)
您最近一年使用:0次
名校
解题方法
7 . 已知函数
.
(1)当
时,证明:
.
(2)若
在
上恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20a21999ea818acdfb48d3641f70d3b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2cbbf4d5b8ecbfccc5de39781396d07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
您最近一年使用:0次
2024-04-18更新
|
839次组卷
|
3卷引用:吉林省延吉市延边第二中学2023-2024学年高二下学期5月期中考试数学试题
名校
解题方法
8 . 已知函数
.
(1)若
恰有两个极值点,求实数
的取值范围;
(2)若
的两个极值点分别为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/125c0225ea4ef140fd3236739a9aa024.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ced2ceab6d52a14af4d477a9ff09823.png)
您最近一年使用:0次
2024-04-01更新
|
520次组卷
|
4卷引用:吉林省珲春市第一高级中学、图们市第二高级中学2023-2024学年高二上学期期末考试数学试题
吉林省珲春市第一高级中学、图们市第二高级中学2023-2024学年高二上学期期末考试数学试题甘肃省武威市天祝第一中学、民勤县第一中学2023-2024学年高二下学期第一次月考数学试题(已下线)专题07 函数的极值和最值的应用8种常考题型归类【好题汇编】-备战2023-2024学年高二数学下学期期末真题分类汇编(北师大版2019选择性必修第二册)青海省海东市第一中学2023-2024学年高二下学期第一次月考数学试题
解题方法
9 . 如图,在四棱锥中,底面ABCD为矩形,侧面PAB为等边三角形,且侧面
底面ABCD,
,E,F分别为PA,BC的中点,G为AE的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/87e90dd9-50f6-4933-9153-4501c13f6c69.png?resizew=168)
(1)证明:BG∥平面EFD;
(2)求平面DEF与平面DCP夹角的余弦值.
您最近一年使用:0次
解题方法
10 . 已知直线l:经过抛物线C:
(
)的焦点F,与抛物线交于A,B两点.过A,B两点且与抛物线相切的直线相交于点P.
(1)求抛物线的标准方程;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0893a169bb1e790ce73c62f63c59ab48.png)
您最近一年使用:0次