名校
1 . 如图四棱锥
中,底面
为矩形,
底面
,点
分别是棱
的中点
![](https://img.xkw.com/dksih/QBM/2020/12/2/2605425608286208/2608434565734400/STEM/f0051fef463c4855b1d5e15949ea0d41.png?resizew=190)
(1)求证![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c568d0ca4910fba8cb12fe3746d740.png)
(2)设
,求二面角
的平面角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24074a80e07e8e533e4120ecc8f6ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c3cc1f331dbb2248b0829039df7f3.png)
![](https://img.xkw.com/dksih/QBM/2020/12/2/2605425608286208/2608434565734400/STEM/f0051fef463c4855b1d5e15949ea0d41.png?resizew=190)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c568d0ca4910fba8cb12fe3746d740.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f323421adf8083d252f0070f54f3a80.png)
您最近一年使用:0次
2020-12-06更新
|
1353次组卷
|
3卷引用:四川省师范大学附属中学2020-2021学年高三上学期期中数学(理)试题
四川省师范大学附属中学2020-2021学年高三上学期期中数学(理)试题(已下线)黄金卷03-【赢在高考·黄金20卷】备战2021年高考数学全真模拟卷(山东高考专用)云南省玉溪第二中学2020-2021学年高二下学期第一次月考数学(理)试题
2020高三·全国·专题练习
名校
2 . 如图,已知在三棱锥
中,
,
,
,
、
分别是
、
的中点,
是
边上一点,且
(
),平面
与平面
所成的二面角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/2717ab92-2f27-4131-b0af-26e32c998cea.png?resizew=188)
(1)证明:平面
平面
;
(2)是否存在
,使
?若存在,求出
的值,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36c469326a3771cea87a36667320f3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef35540101a8d7331dfe62fd1ab4d674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2ae7866f0754c2e7ab2ab918db2480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d6969d1f0cf82ae2c941cadfe0ca0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540ccd15435aa2d59e809d6a28fb2467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90131175c3fb6a3837a22d7d5bbc268d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/2717ab92-2f27-4131-b0af-26e32c998cea.png?resizew=188)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec0caaaded0aba9cf0e57bdb6025df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-11-26更新
|
1138次组卷
|
8卷引用:专题45 空间向量及其应用综合练习-2021年高考一轮数学单元复习一遍过(新高考地区专用)
(已下线)专题45 空间向量及其应用综合练习-2021年高考一轮数学单元复习一遍过(新高考地区专用)(已下线)专题45 空间向量及其应用综合练习-2021年高考一轮数学(理)单元复习一遍过(已下线)黄金卷08-【赢在高考·黄金20卷】备战2021年高考数学(理)全真模拟卷(新课标Ⅱ卷)(已下线)黄金卷09-【赢在高考·黄金20卷】备战2021年高考数学(理)全真模拟卷(新课标Ⅲ卷)黑龙江省绥化市青冈县第一中学2020-2021学年高二第一学期月考(腾飞班)数学(理)试题江西省吉安县立中学2020-2021学年高二12月月考数学(理A)试题(已下线)专题04 空间向量与立体几何综合练习-(新教材)2020-2021学年高二数学单元复习(人教A版选择性必修第一册)江苏省常州市高级中学2022-2023学年高二下学期6月月考数学试题
2020高三·全国·专题练习
名校
3 . 如图所示,在直三棱柱
中,
,
,
,点
是
的中点.
平面
;
(2)求
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ad3a578f403b9e6b97fa2dc955fc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462b1c65b1b233ab98a90c164c0968c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762b8cac66d86a013ba839266b023e54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
您最近一年使用:0次
2020-11-26更新
|
553次组卷
|
5卷引用:专题45 空间向量及其应用综合练习-2021年高考一轮数学单元复习一遍过(新高考地区专用)
(已下线)专题45 空间向量及其应用综合练习-2021年高考一轮数学单元复习一遍过(新高考地区专用)(已下线)专题45 空间向量及其应用综合练习-2021年高考一轮数学(理)单元复习一遍过(已下线)专题04 空间向量与立体几何综合练习-(新教材)2020-2021学年高二数学单元复习(人教A版选择性必修第一册)甘肃省庆阳市华池县第一中学2022-2023学年高二下学期期末考试数学试题福建省福州第四中学2023-2024学年高二下学期第一学段模块检测数学试卷
名校
4 . 如图,在四棱锥
中,底面
中
,
,侧面
平面
,且
,点
在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/29abe2ad-3248-4320-95f7-063435bc37e4.png?resizew=198)
(Ⅰ)证明:
平面
;
(Ⅱ)求二面角
的余弦值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3402ea855e2ae2dcd98f607bef4fdd6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4770a1f98495ff85859bc6508d6d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b54647a7c34d1046c8d6c198d3654d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/29abe2ad-3248-4320-95f7-063435bc37e4.png?resizew=198)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135a12aa48eb33bf5116662e0f9f0799.png)
您最近一年使用:0次
2020-11-24更新
|
1030次组卷
|
4卷引用:天一大联考(河北广东全国新高考)2020—2021 学年高中毕业班阶段性测试(二)
天一大联考(河北广东全国新高考)2020—2021 学年高中毕业班阶段性测试(二)(已下线)第八单元 立体几何 (A卷 基础过关检测)-2021年高考数学(理)一轮复习单元滚动双测卷广西南宁市2021届高三12月特训测试理科数学试题内蒙古赤峰红旗中学2021-2022学年下学期高二年级期中考试数学试题
解题方法
5 . 已知直四棱柱
的所有棱长相等,
,则直线
与平面
所成角的正切值等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d4e574c9d139615d991a168cfbf63b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
6 . 如图,在三棱柱
中,
是边长为2的等边三角形,平面
平面
,四边形
为菱形,
,
与
相交于点D.
(1)求证:
.
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5f9ef971747d2d5bbc5823797a7a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140088b0cb73812aa9d523c44559298a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a252001e9b7edcba240973a32ab3fb6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/e8ee0cea-3dd2-45dc-9889-74bf5ac30626.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d57d82c046d22a1484e1c23ddbc9ee.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
2020-09-26更新
|
811次组卷
|
8卷引用:安徽省皖南八校2020-2021学年高三上学期摸底联考理科数学试题
安徽省皖南八校2020-2021学年高三上学期摸底联考理科数学试题(已下线)2021届普通高等学校招生全国统一考试数学考向卷(七)(已下线)专题19 立体几何综合-2020年高考数学母题题源全揭秘(浙江专版)内蒙古赤峰二中2020-2021学年高二上学期第二次月考数学(理)试题辽宁省凌源市2020-2021学年下学期高二尖子生抽测数学试题云南省曲靖市会泽县茚旺高级中学2020-2021学年高二春季6月月考数学(理)试题陕西省榆林市绥德中学2020-2021学年高二下学期6月质量检测理科数学试题云南省临沧市民族中学-2022-2023学年高二上学期期末数学试题
名校
7 . 如图,
为圆锥的顶点,
为底面圆心,点
,
在底面圆周上,且
,点
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/6eac220e-36d5-4924-8579-2cb8998cc878.png?resizew=141)
求证:
;
若圆锥的底面半径为
,高为
,求直线
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/6eac220e-36d5-4924-8579-2cb8998cc878.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464e16e3387532eb66521b4e97791cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97fa483ce5e3575ff399722caba7b943.png)
您最近一年使用:0次
2020-09-22更新
|
1467次组卷
|
7卷引用:河南省中原名校联盟2020-2021学年高三上学期第一次质量考评数学(理科)试题
名校
解题方法
8 . 如图,在直三棱柱
中,
,
,
,
分别是棱
,
的中点,点
在直线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/eb0b7fcf-ffe2-4f29-98d5-316761b24085.png?resizew=151)
(1)求直线
与平面
所成的角最大时,线段
的长度;
(2)是否存在这样的点
,使平面
与平面
所成的二面角为
,如果存在,试确定点
的位置;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09bdbf17f7bb0e70a339b4a1971d5c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/eb0b7fcf-ffe2-4f29-98d5-316761b24085.png?resizew=151)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
(2)是否存在这样的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,三棱柱
中,D是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/03656881-a632-4480-aef3-10b67aaffd28.png?resizew=193)
(1)证明:
面
;
(2)若△
是边长为2的正三角形,且
,
,平面
平面
.求平面
与侧面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/03656881-a632-4480-aef3-10b67aaffd28.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5830646a912c3a916beac4f88c116b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(2)若△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad91719bd5fdc1b2d3d5298f2f44cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd426c9273efec5173db056d1d099f9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
您最近一年使用:0次
2020-08-17更新
|
1717次组卷
|
7卷引用:内蒙古呼和浩特市2020届高三第二次质量普查调研考试(二模)数学(理)试题
名校
解题方法
10 . 如图,已知三棱柱
中,侧棱与底面垂直,且
,
,
、
分别是
、
的中点,点
在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/1aec0e7a-1bdf-4ff6-915c-6ba733ac01a9.png?resizew=170)
(1)求证:不论
取何值,总有
;
(2)当
时,求平面
与平面
所成二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002c709e9fee8d477bddfe595cc760f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666b6c488afe7142df3da04d0ef573cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/1aec0e7a-1bdf-4ff6-915c-6ba733ac01a9.png?resizew=170)
(1)求证:不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e4ece75fe9b8555909be5a00d2b7af0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500d68f2678989a5ce7431cfd51b019d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2020-08-05更新
|
923次组卷
|
11卷引用:山西省实验中学2019-2020学年高三下学期3月开学摸底数学(理)试题
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