解题方法
1 . 已知数列
的前
项和为
,且
.
(1)证明数列
是等比数列,并求
的通项公式.
(2)设数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/69f650318d5dc7302ad7c1f19230be03.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13430afc40fc85c8bb5b69065f878acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b942755901c7564295eaccdea1c24f7.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/b4b742353051ebe0d09bb809493423c3.png)
您最近一年使用:0次
解题方法
2 . 如图,AB为圆O的直径,点E、F在圆O上,
,矩形ABCD所在的平面和圆O所在的平面互相垂直,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/dcf830af-d3fd-43c7-bdcf-3a8b86c600eb.png?resizew=180)
(1)求证:
平面
;
(2)设FC的中点为M,求证:
∥平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666734423f1818d76a74f171b7420b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a951292add4574c1debd16800674e1e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/dcf830af-d3fd-43c7-bdcf-3a8b86c600eb.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603c7e98deecdba0cf3773757a9b8304.png)
(2)设FC的中点为M,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c93a34cbd4c0dc198b74524c0e05a10.png)
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2021-09-13更新
|
187次组卷
|
2卷引用:贵州省毕节市实验高级中学2020-2021学年高二上学期第一次月考数学(文)试题
解题方法
3 . 已知ABCD是边长为2的正方形,平面
平面DEC,直线AE,BE与平面DEC所成的角都为45°.
![](https://img.xkw.com/dksih/QBM/2021/11/18/2854152125972480/2861941634793472/STEM/2c0f360e744247acbdc48ea7ad5bfe81.png?resizew=214)
(1)证明:
.
(2)求四棱锥E-ABCD的体积V.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://img.xkw.com/dksih/QBM/2021/11/18/2854152125972480/2861941634793472/STEM/2c0f360e744247acbdc48ea7ad5bfe81.png?resizew=214)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0aaa5cf7dafac1b64eafe84cae5674.png)
(2)求四棱锥E-ABCD的体积V.
您最近一年使用:0次
2021-11-29更新
|
315次组卷
|
2卷引用:贵州省毕节市金沙县2022届高三11月月考数学(文)试题
解题方法
4 . 如图,已知三棱柱
的侧棱与底面垂直,
,
,
,
和
分别是
,
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/9b0b5c6b-42ea-40fd-8428-9abdcbddc6e2.png?resizew=147)
(1)证明:
平面
;
(2)已知直线
与平面
相交于点
,求
的值.
![](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/dad2a36927223bd70f426ba06aea4b45.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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/9b0b5c6b-42ea-40fd-8428-9abdcbddc6e2.png?resizew=147)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc027de6ca8c118ed6ccd52eae99a821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bfd8e9f2f08a5807a23677988b240b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b49429929efaab82649bf6003f0ad7.png)
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解题方法
5 . 如图,在四棱锥
中,四边形
是菱形,
平面
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/8bd30c3a-1dab-47e5-a135-cd9505e5c323.png?resizew=161)
(1)证明:
平面
.
(2)若
,
,求点
到平面
的距离.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/8bd30c3a-1dab-47e5-a135-cd9505e5c323.png?resizew=161)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e90f9f4e44173888a54c624852064a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2753753faf2cb9a0003aa8e3945159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
解题方法
6 . 已知
是定义域为R的偶函数,且
.
(1)求a,b的值;
(2)判断
在
上的单调性,并用定义法证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4bbe201eede86914a5336706ebf794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
(1)求a,b的值;
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
您最近一年使用:0次
解题方法
7 . 如图,在三棱锥
中,
是边长为4的正三角形,平面
平面
,
,M为AB的中点.
![](https://img.xkw.com/dksih/QBM/2021/4/14/2699662442315776/2808047347777536/STEM/111ca7a5-c563-467d-8a2a-7ca1ed24729b.png?resizew=222)
(1)证明:
;
(2)求二面角
的余弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ca6072b3a2aac406a2b60bb7e01cde.png)
![](https://img.xkw.com/dksih/QBM/2021/4/14/2699662442315776/2808047347777536/STEM/111ca7a5-c563-467d-8a2a-7ca1ed24729b.png?resizew=222)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fa715d27ae43ec1e157226bc9dea54.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0262d3168bd3296cc63c4d78965cbb2c.png)
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8 . 如图,已知在长方体
中,
为
上一点,且
.
![](https://img.xkw.com/dksih/QBM/2021/7/15/2764853762179072/2775391841681408/STEM/9542d112171245629ba97725cb3c3eef.png?resizew=209)
(1)求证:平面
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ccf3c5561e747353e5914b6f612db7c.png)
![](https://img.xkw.com/dksih/QBM/2021/7/15/2764853762179072/2775391841681408/STEM/9542d112171245629ba97725cb3c3eef.png?resizew=209)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2147971abecf15404665d75f577ebfff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84c4fa63b2f77ded57f6b4a07d619c2.png)
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9 . 如图,四边形
是矩形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
.
![](https://img.xkw.com/dksih/QBM/2022/1/6/2854801019756544/2889936155975680/STEM/f8846769-3e24-4a24-a45a-3712cdfbbd6d.png?resizew=142)
(1)证明:
平面
.
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813f2f1611bde7afc9b8280b35dd84a8.png)
![](https://img.xkw.com/dksih/QBM/2022/1/6/2854801019756544/2889936155975680/STEM/f8846769-3e24-4a24-a45a-3712cdfbbd6d.png?resizew=142)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e0bd4b30dc777ac9da80f6baa3eb31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2022-01-08更新
|
364次组卷
|
2卷引用:贵州省毕节市金沙县2022届高三11月月考数学(理)试题
解题方法
10 . 已知函数
.
(1)解不等式
;
(2)若k是
的最小值,已知
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccb53e246cd4c5eae6816a6d5bb7361.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd473ced871bbb4232d1ef4516592.png)
(2)若k是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de4b40bf2b75e6e94f04b1009f7aa7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3647067684e0c29ba66a20a0d2ebecc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c49f91b2eea9e72527876e5291cf15d.png)
您最近一年使用:0次
2021-05-12更新
|
343次组卷
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4卷引用:贵州省毕节市2021届高三三模数学(文)试题
贵州省毕节市2021届高三三模数学(文)试题贵州省毕节市2021届高三三模数学(理)试题(已下线)3.1函数的概念及其表示(专题强化卷)-2021-2022学年高一数学课堂精选(人教版A版2019必修第一册)(已下线)押第23题 不等式选讲-备战2021年高考数学(文)临考题号押题(全国卷2)