1 . 已知数列
满足
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060c880252326cb449d8253539d92aff.png)
(1)判断数列
是否是等比数列?若是,给出证明;否则,请说明理由;
(2)若数列
的前10项和为361,记
,数列
的前n项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060c880252326cb449d8253539d92aff.png)
(1)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf33b2a94eae16760d746f9b4b8dbc.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04053ecf80b3bb9179c8baab47bf8dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffc0cf1f0a00718b95a2a4fffd11dd32.png)
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2023-08-20更新
|
2544次组卷
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9卷引用:安徽省池州市第一中学2024届高三上学期“七省联考” 数学模拟练习(2)
解题方法
2 . 在四棱锥
中,底面
为平行四边形,
平面
,
,设平面
与平面
的公共直线为l.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/0b73214c-947c-4d7d-90a7-598e26d90aef.png?resizew=202)
(1)写出图中与l平行的直线,并证明;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfcf34539673d516eb9b259951a81ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f526e2fe627bb4ddebe708c07d0a22fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59502f452fb6a290484608e65a412df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f526e2fe627bb4ddebe708c07d0a22fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cfd630472bc73bd8c2209376dbe9d1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/0b73214c-947c-4d7d-90a7-598e26d90aef.png?resizew=202)
(1)写出图中与l平行的直线,并证明;
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00acc724bbb4569974d4775675a6fda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af57d63e83ef0e183add10cd6beec65b.png)
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名校
3 . 已知函数
(
).
(1)求
的最小值;
(2)试根据(1)的结论证明:设正数P1、P2、P3、P4满足P1+P2+P3+P4=1,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acf19a19a01419be0662fb59ec65cc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca542e78b7d77d008c9c4752afa91a55.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)试根据(1)的结论证明:设正数P1、P2、P3、P4满足P1+P2+P3+P4=1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3046dab80c7850c1f1f142dbe6856a0.png)
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名校
4 . 分析法又称执果索因法,若用分析法证明:“设
且
求证
”,索的因应是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9dde438c0313648d5cce6d16f990886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc327cd1318a328d8b4043fa9371ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff6d61a8eaff20b364a9e3235577c69.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 选用恰当的证明方法,证明下列不等式.
(1)证明:求证
;
(2)设
,
,
都是正数,求证:
.
(1)证明:求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c19d94ff48082c1cd213c82c99abf0.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533937a08d1ed87594ac52c658be9649.png)
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2019-11-23更新
|
1312次组卷
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3卷引用:安徽省池州市青阳县第一中学2020-2021学年高二下学期3月月考文科数学试题
安徽省池州市青阳县第一中学2020-2021学年高二下学期3月月考文科数学试题辽宁省大连市2019-2020学年高一上学期期中数学试题(已下线)2.2基本不等式-2021-2022学年高一数学同步辅导讲义与检测(人教A版2019必修第一册)
名校
6 . (1)用数学归纳法证明:
;
(2)已知
,
,且
,求证:
和
中至少有一个小于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc84a3551d9ff61fef65f06303a91d0.png)
(2)已知
![](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/69bbd0aae5a4f6129fc78f88f662f092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165b2250624fc1f1551d6c38991487d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb82093f9c1ec3ee4218ae8f8377644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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2019-04-16更新
|
758次组卷
|
4卷引用:安徽省池州市东至县第二中学2020-2021学年高二下学期4月期中理科数学试题
7 . 已知函数
.
(1)求证:函数为奇函数;
(2)用定义证明:函数
是
上单调递增.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05bc7c0255ac2f6481f57f01a7f57436.png)
(1)求证:函数为奇函数;
(2)用定义证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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13-14高二上·安徽池州·期中
8 . 矩形
的中心在坐标原点,边
与
轴平行,
=8,
=6.
分别是矩形四条边的中点,
是线段
的四等分点,
是线段
的四等分点.设直线
与
,
与
,
与
的交点依次为
.
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/57f1591ebeb842f19cbd763b71f91200.png)
(1)以
为长轴,以
为短轴的椭圆Q的方程;
(2)根据条件可判定点
都在(1)中的椭圆Q上,请以点L为例,给出证明(即证明点L在椭圆Q上).
(3)设线段
的
(
等分点从左向右依次为
,线段
的
等分点从上向下依次为
,那么直线
与哪条直线的交点一定在椭圆Q上?(写出结果即可,此问不要求证明)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/435b32cf5c70495d8a9d4ae686403b4e.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/f9e9f76a62c94107aede2953c25c254a.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/6759f0b6901340f8b45b2dd7c9b0f686.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/f9e9f76a62c94107aede2953c25c254a.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/0944b5e4d0eb448480b8a5ed7701764f.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/8b4d9f94de0845cca892771d54aaa380.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/4af4218c3ee24fa2a45bc052a533e366.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/86c3196595864ed987d9176ce60110d3.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/1c89e7ef630a4caebd00a40541db89e2.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/52b21f978fec4d919d0ce9514f5c5c6a.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/7cf316df36354570b9695d8b198bc600.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/1ec51823a90b49449b4cb9df6d8e6d8a.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/4dd956b823c240a6aee2a935734e2b45.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/f24db0921c334e5f9d168df0f09a7da8.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/a40af3c63639460a8bd0aa73dc5c35a6.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/e163e696296f496c807f6906f549a775.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/ff27d02022384d009917f6cdb1641ce6.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/57f1591ebeb842f19cbd763b71f91200.png)
(1)以
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/22b901d8dabe44fd9eab93ed4dc7aa4d.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/ec4d271858b64924b9da55af5ca50212.png)
(2)根据条件可判定点
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/ff27d02022384d009917f6cdb1641ce6.png)
(3)设线段
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/86c3196595864ed987d9176ce60110d3.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/a850fcc7040e43a3b14bd41677fb5a13.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/9583e5aee617486aa2d5793549fbd241.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/5e49a32f835f41aa875bc23536562cf0.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/52b21f978fec4d919d0ce9514f5c5c6a.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/a850fcc7040e43a3b14bd41677fb5a13.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/a961e17883464621a631d89b586232bf.png)
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571457090797568/1571457096687616/STEM/b5b5ffc22ad344929af9d7d5b7f748d4.png)
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11-12高二上·浙江金华·阶段练习
名校
9 . 若直线l:x+my+c=0与抛物线y2=2x交于A、B两点,O点是坐标原点.
(1)当m=﹣1,c=﹣2时,求证:OA⊥OB;
(2)若OA⊥OB,求证:直线l恒过定点;并求出这个定点坐标.
(3)当OA⊥OB时,试问△OAB的外接圆与抛物线的准线位置关系如何?证明你的结论.
(1)当m=﹣1,c=﹣2时,求证:OA⊥OB;
(2)若OA⊥OB,求证:直线l恒过定点;并求出这个定点坐标.
(3)当OA⊥OB时,试问△OAB的外接圆与抛物线的准线位置关系如何?证明你的结论.
您最近一年使用:0次
2016-12-01更新
|
856次组卷
|
4卷引用:安徽省池州市东至县第二中学2020-2021学年高二下学期3月月考文科数学试题
安徽省池州市东至县第二中学2020-2021学年高二下学期3月月考文科数学试题(已下线)2011-2012学年浙江省东阳中学高二12月阶段性检测理科数学试卷(已下线)2011-2012学年山东省汶上一中高二12月月考理科数学辽宁省锦州市联合校2021-2022学年高二上学期期末模拟数学试题(锦州五高命题)
2011·辽宁沈阳·模拟预测
10 . 已知二次函数
和“伪二次函数”![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5a9b750094486e1eefebcd02c22eec.png)
(
、
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50f9c6eac4df8472e6a7446ebde7230.png)
),
(I)证明:只要
,无论
取何值,函数
在定义域内不可能总为增函数;
(II)在二次函数
图象上任意取不同两点
,线段
中点的横坐标为
,记直线
的斜率为
,
(i)求证:
;
(ii)对于“伪二次函数”
,是否有(i)同样的性质?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e73001005c51065ad1315be7a4175d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5a9b750094486e1eefebcd02c22eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb7dd8a018719c13d39eafdd39b59bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50f9c6eac4df8472e6a7446ebde7230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9173f81cce498276001b0285454972e0.png)
(I)证明:只要
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bc334305133ac2b4b8d21efeb3324c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
(II)在二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e73001005c51065ad1315be7a4175d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4daf40bad1cc89311930cce356672354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(i)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4268b18eccd4761ec42b59508b913e8.png)
(ii)对于“伪二次函数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d943bb3fbdc91b5097b7e34270e5c37.png)
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