解题方法
1 . 如图,在直三棱柱
中,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/a3acc036-e01d-48a6-8ef3-1a66c959410a.jpg?resizew=126)
(1)证明:
平面
;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cf3bff56a7f4ab6c0008e90823025d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/a3acc036-e01d-48a6-8ef3-1a66c959410a.jpg?resizew=126)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d85c8d87197c9ffad619eb3912e1b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6610370a5aefaf45fdb579521484e3b5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e937690538483bca282ff6831772b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3bdeec91171e6d0c5247f199ffd7c63.png)
您最近一年使用:0次
2018-03-26更新
|
803次组卷
|
4卷引用:陕西省渭南市蒲城中学2023-2024学年高二上学期9月开学考试数学试题
名校
2 . 已知在四棱锥中,底面
为正方形,侧棱
平面
,点
在线段
上,直线
平面
,
.
(1)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
您最近一年使用:0次
2024-01-24更新
|
258次组卷
|
3卷引用:陕西省渭南市蒲城县2024届高三第二次对抗赛数学(理科)试题
3 . 如图,在矩形
中,
,
,
为
的中点,将
沿
折起,使点
到点
处,平面
平面
.
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.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/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ec3d90e5f12cd8946d4dc638c1a357.png)
您最近一年使用:0次
名校
4 . 已知函数
.
(1)讨论函数
的单调性;
(2)当
时,证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3c99bd82e5a900022c3d20e2335ec4.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27f3e843409e6334c8bb2cb683722f3.png)
您最近一年使用:0次
2024-03-06更新
|
2118次组卷
|
10卷引用:陕西省榆林市府谷县府谷中学2023-2024学年高二上学期开学考试数学试题
陕西省榆林市府谷县府谷中学2023-2024学年高二上学期开学考试数学试题(已下线)导数专题:导数与不等式成立问题(6大题型)-2023-2024学年高二数学题型分类归纳讲与练(人教A版2019选择性必修第二册)河南省洛阳市强基联盟(新安一高)2023-2024学年高二3月联考数学试卷 广东省清远市阳山县南阳中学2023-2024学年高二下学期第一次月考数学试题(已下线)高二下学期期中考试(范围:数列、导数、计数原理)-2023-2024学年高二数学下学期重难点突破及混淆易错规避(人教A版2019)黑龙江省双鸭山市第一中学2023-2024学年高二下学期4月月考数学试题(已下线)模块一 专题6 导数在不等式中的应用(讲)(人教B版)四川省巴中市平昌县第二中学2023-2024学年高二下学期第一次月考数学试题广东省潮州市松昌中学2023-2024学年高二下学期期中考试数学试题黑龙江省哈尔滨市第十一中学校2023-2024学年高二下学期期中考试数学试题
5 . 如图,在四棱锥
中,四边形
是菱形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/f3a6b22b-d1a0-40f1-9c9c-6ffb655cd8cd.png?resizew=170)
(1)证明:平面
平面
.
(2)求二面角
的余弦值.
![](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/917059c4d68de6935b5b010edd3b2efb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/f3a6b22b-d1a0-40f1-9c9c-6ffb655cd8cd.png?resizew=170)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b31c44f920e6e09b02f03ec82ef843.png)
您最近一年使用:0次
2024-03-03更新
|
454次组卷
|
2卷引用:陕西省部分学校2023-2024学年高二下学期开学摸底考试数学试卷
6 . 如图,在正四棱台
中,
.
(1)证明:
.
(2)若正四棱台
的高为3,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d134433600df75f2a5d0f35deb2cac90.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/2/5f536143-82cd-4116-8933-d569091b5b55.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a0e00113872f921116b6c0c3177d0f.png)
(2)若正四棱台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
您最近一年使用:0次
名校
解题方法
7 . 已知
,且
.
(1)证明:
;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec307143b4bf45106369f256a796d61.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c9dd044c24a1c2f7d5b2bce978b450.png)
您最近一年使用:0次
2024-02-23更新
|
436次组卷
|
5卷引用:陕西省安康市2024届高三下学期开学测评数学(理科)试题
名校
8 . 设
是等差数列,
是等比数列,且
.
(1)求
与
的通项公式;
(2)设
的前
项和为
,求证:
;
(3)若
,且数列
的前
项和为
,求证:
.
![](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/6f6eba282321f5d17e3de9b6544e9f6f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](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/702b31070b4001b47426d73831e585b5.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc79e006b192782170fdb16384ba5879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0022c073e919d163032a4f5923e893ef.png)
您最近一年使用:0次
9 . 已知等差数列
的前
项和为
,
,
,数列
是各项均为正数的等比数列,
,
.
(1)求数列
和
的通项公式;
(2)令
,数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/f6278d3cc0086c7aab6ac20712c7d0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7037f2d5fb7799e24df151ac5d6ad6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aaee408bdec05bbdfcd4b841a331e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58caef2c61cea653bc1b666b3a328f5.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c2a5f8ec179b72b201c3c0a670612a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78bd6c798311d3fa516f9f829f091875.png)
您最近一年使用:0次
10 . 如图,在三棱台
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/3710d003-fb29-471a-af5c-43b24f3de348.png?resizew=181)
(1)证明:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c20287386583c8ee11b44b1af0de5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2106309ce73b6cfc480fe0389c1c9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354c20e085fe1a99a8be03bd1d16b2f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/3710d003-fb29-471a-af5c-43b24f3de348.png?resizew=181)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8e94ba1dfb62069fb125be98d2498a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
您最近一年使用:0次
2024-03-17更新
|
1874次组卷
|
6卷引用:陕西省百师联盟2024届高三下学期开年摸底联考理科数学试题(全国卷)