1 . 如图,在四棱锥
中,
平面
,
,
都是等腰直角三角形,
,四边形
是直角梯形,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/63a208c8-e4de-41c8-be01-68d2f3112d6a.png?resizew=192)
(1)求证:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](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/d9f8f01137e92c0f2e63467036ae9cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf410aab32ba002b2c4e7343e7efd4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83b76a280fc562446ee8ddd2d6bf1d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/63a208c8-e4de-41c8-be01-68d2f3112d6a.png?resizew=192)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d50a68fed1c23837d1267bdda5c1962.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2 . 如图所示,在直三棱柱
中,
,其中点
为棱
的中点,
为棱
上且位于
点上方的动点.
(1)求证:
平面
;
(2)若平面
与平面
所成的锐二面角的余弦值为
,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/f1611e6d8c53342220a7386b238110f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b4e753ef119608188c46a50ec597e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64484f96568410926e0c50898eba6e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e763e8c7139ffeb0cc7269ae4cdfeab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
您最近一年使用:0次
2019-03-11更新
|
501次组卷
|
2卷引用:【市级联考】湖北省恩施州2019届高三2月教学质量检测数学(理)试题
3 . 如图
,梯形
中,
,过
分别作
,
,垂足分别
,
,已知
,将梯形
沿
同侧折起,得空间几何体
,如图
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/04cd611c-d016-4e37-bab1-66d7c2f132fa.png?resizew=394)
1
若
,证明:
平面
;
2
若
,
,线段
上存在一点
,满足
与平面
所成角的正弦值为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baca09215d12421a58bd6a48ae16c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4611ceb2a28f7a7e4d24266d7f99b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ff7bf8ffc8a04186e3e13c1a6d5ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f4a2bbfb86ca5c6099a6d7330a8478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268544817735d20ffbceef3b26db5dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a935e957d5cb3794901468489aca38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0c12379ff58d8ddf66547d7a873baf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/04cd611c-d016-4e37-bab1-66d7c2f132fa.png?resizew=394)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39b13d187b25461d85a3b8d10c7b678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dced11455b3e31a9090915f80a046fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ea07c396a9883d159ce2887ce65466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
2019-03-04更新
|
3159次组卷
|
8卷引用:【市级联考】湖北省荆门市2019届高三元月调研考试数学(理)试题
2014·河北邯郸·二模
名校
解题方法
4 . 如图,矩形
中,
平面
,
,
为
上的点,且
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/1f9db9de-d950-4979-8cca-ba93bc95c956.png?resizew=172)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b3581f73c778ecb0931c1ab30392ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327832ffb5a937d88a1069395a8552af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/1f9db9de-d950-4979-8cca-ba93bc95c956.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9efe66d99f813c6b1387392186822bb.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/470d3cfe1c52850807cb4cfc407e3153.png)
您最近一年使用:0次
2020-09-04更新
|
525次组卷
|
12卷引用:2015届湖北省襄阳市五中高三5月模拟考试一文科数学试卷
2015届湖北省襄阳市五中高三5月模拟考试一文科数学试卷湖北省襄阳市2019-2020学年高二上学期期末数学试题(已下线)2014届河北省邯郸市高三上学期第二次模拟考试文科数学试卷2015届山东省枣庄市薛城八中4月模拟考试文科数学试卷黑龙江省双鸭山市第一中学2016-2017学年高一下学期期末考试数学(理)试题黑龙江省双鸭山市第一中学2016-2017学年高一下学期期末考试数学(文)试题辽宁省大连市旅顺口区2018-2019学年高一下学期期末数学(理)试题辽宁省大连市旅顺口区2018-2019学年高一下学期期末数学(文)试题云南省昆明市官渡区第一中学2019-2020学年高二上学期期末考试数学(文)试题四川省宜宾市第四中学2020-2021学年高二上学期开学考试数学(文)试题安徽省淮南市第二中学20202-2021学年高二(文科平行班)上学期第二次月考数学试题甘肃省白银市会宁县第四中学2021届高三上学期第四次月考数学(文)试题
5 . 如图所示的几何体中,ABC-A1B1C1为三棱柱,且AA1⊥平面ABC, AA1=AC,四边形ABCD为平行四边形,AD=2CD=4,∠ADC=60°.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/37c8da88-ca48-4073-96e2-0fa003e6adf9.png?resizew=174)
(Ⅰ)求证:
;
(Ⅱ)求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/37c8da88-ca48-4073-96e2-0fa003e6adf9.png?resizew=174)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5718fe055b1d4a3f3cc4f32e9b567499.png)
(Ⅱ)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dcecfc88e45465b7e2215a8557148da.png)
您最近一年使用:0次
2019-02-21更新
|
1391次组卷
|
8卷引用:2019届湖北省黄冈中学高三下学期5月第三次模拟考试数学(文)试题
6 . 如图,在多面体
中,四边形
为矩形,直线
与平面
所成的角为
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/e5f9e7f6-1e0a-4c91-9ac1-27c3b63cbb67.png?resizew=225)
(1)求证:直线
平面
;
(2)点
在线段
上,且
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d5a164bf56f8fb92527ad78bc10ccf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9bf2423499d45354dbc8377f1f04e16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dced11455b3e31a9090915f80a046fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbb52f9b226b1db3f6f9f055948bd38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7afaac7820e0422a64e5704fc9d1b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f1e80e44f107af592fc8fd96419ba8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/e5f9e7f6-1e0a-4c91-9ac1-27c3b63cbb67.png?resizew=225)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10cb6f2851edd238504369b3fda11d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e0e726e470119882d11bad7301924fd.png)
您最近一年使用:0次
2019-02-12更新
|
1182次组卷
|
2卷引用:湖北省十一校2024届高三联考考后提升数学模拟训练一
7 . 在如图所示的几何体中,
,
为全等的正三角形,且平面
平面
,平面
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/dca6823d-7885-4a03-9cdf-e023dbe54d94.png?resizew=169)
(1)证明:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b726cf24ace7b575fc58e8de7da2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b6aea2c09a53eb8ba2305c895468af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8ff58f671a287701011a1b31e67e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14172212b7b34eaf967c5a72233621c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f2966d1867b11a056d70bb8ae44e5e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/dca6823d-7885-4a03-9cdf-e023dbe54d94.png?resizew=169)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe7eaf967808dad0a184eeedfa27721.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
您最近一年使用:0次
2019-02-12更新
|
571次组卷
|
2卷引用:【市级联考】湖北省十堰市2019届高三年级元月调研考试文科数学试题
8 . 如图,在四棱锥
中,已知
是等边三角形,
平面
,
,
,点
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2019/2/9/2137046981369856/2138294552092672/STEM/a6fcd253a79344d99ff324e6f70ce735.png?resizew=227)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fcb0ab3b6099434e4cdde2ea871f3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2019/2/9/2137046981369856/2138294552092672/STEM/a6fcd253a79344d99ff324e6f70ce735.png?resizew=227)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e77e93fb69b4c0716dde86f52e7406.png)
您最近一年使用:0次
2019-02-11更新
|
991次组卷
|
3卷引用:【校级联考】湖北省部分重点中学2019届高三第二次联考数学(文科)试题
名校
9 . 如图1,矩形
中,
,M是
边上异于端点的动点,
于点N,将矩形
沿
折叠至
处,使面
面
(如图2).点E,F满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/91c9d39e-9f7e-4d41-9157-5376b9d05328.png?resizew=453)
(1)证明:
面
;
(2)设
,当x为何值时,四面体
的体积最大,并求出最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9639896487e6cf18e8fd02d2a7ed2087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab384f2520d76ed8fa01b31e09c1eea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80a0e428cb894bfd09a6129a73ea4ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a47ca365469c996a6b8cb47284764f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46efd4004cc47ba16d3d53b07d40b145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e825de4e5ade72e45a28c8f75b1dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b04eeb552bee53eda166bfb2b85578.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/91c9d39e-9f7e-4d41-9157-5376b9d05328.png?resizew=453)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e787bb792dcd936cb4e87023c95011b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f780ed359b94450fc80cf57e66a4ad8.png)
您最近一年使用:0次
2019-02-05更新
|
710次组卷
|
2卷引用:【全国百强校】湖北省荆州中学、宜昌一中等“荆、荆、襄、宜四地七校考试联盟”2019届高三上学期期末考试数学(文)试题
名校
10 . 如图,在三棱锥
中,
,
,
,
,
,
分别为线段
,
上的点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7b450a34-8cb3-451c-9f80-d35ae0238ac3.png?resizew=131)
(1)证明:
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7c18f9db65fcd840b39d7bbd3028c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28597da489dc639750523c83fbc11c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e99aae9fa3f0cd6405461b8db163e8.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aabee6b0c633ffd42f01af2e1fb8a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75dc7cef548ba1fda2b082733baae52.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7b450a34-8cb3-451c-9f80-d35ae0238ac3.png?resizew=131)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb0f9de2f087af7ef18ee9184d88b51.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69fbd5a9df4c0210604cf1ae2fa7e0c.png)
您最近一年使用:0次
2019-01-23更新
|
508次组卷
|
5卷引用:【市级联考】湖北省十堰市2019届高三元月调研考试理科数学试题