名校
1 . 已知
,我们知道
成立.
(1)求证:
;
(2)同理我们也可以证明出
.由上述几个不等式,请你猜测一个与
和
有关的不等式,并用数学归纳法证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81cbab062d7c2b918dca90e9e92682f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df660da8b095ea86e010d54080be614.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b2e22d798a51902cbfd62a24641009.png)
(2)同理我们也可以证明出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9b07fd25b6e44656f6b186c7bb6915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83ebbc345b194f2a9063d8e10e40672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5da2c6ead4d33e9a602dc85bd55c598.png)
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2017-06-27更新
|
296次组卷
|
3卷引用:福建省三明市第一中学2016-2017学年高二下学期第二次月考数学(理)试题
福建省三明市第一中学2016-2017学年高二下学期第二次月考数学(理)试题(已下线)专题12.2 直接证明与间接证明、数学归纳法(精练)-2021年高考数学(理)一轮复习讲练测陕西省西安市第一中学2020-2021学年高二下学期期中理科数学试题
10-11高二下·福建·阶段练习
2 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f3d9088bfaafb7101cda7a59ec44f9.png)
(1)求证:函数
在
上为增函数;(2)证明:方程
没有负根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f3d9088bfaafb7101cda7a59ec44f9.png)
(1)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f00bba28ce932fbcc82ed562994f031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
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名校
3 . 如图,在正方形
中,
分别为
的中点,求证:
(利用向量证明).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
![](https://img.xkw.com/dksih/QBM/2017/3/7/1638695154688000/1644407990149120/STEM/b57ecf0b82934abe834a695cfd971481.png?resizew=131)
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2017-03-15更新
|
1584次组卷
|
4卷引用:2015-2016学年河北省石家庄市辛集中学高一下学期综合练习(一)数学试卷
2014·陕西·模拟预测
4 . 已知数列
的前n项和为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e7075462365271b0e865509de43363.png)
(1)证明:数列
是等差数列,并求
;
(2)设
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a2eafb3dd274dd9b98d83c38e87802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e7075462365271b0e865509de43363.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a2eafb3dd274dd9b98d83c38e87802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd04c9e114f9b99a8ffbac981a88937.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8d04059bfffc50f39e67adc9a11470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718f9b9e4032e388f4ad5989962b857e.png)
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2010·北京朝阳·二模
解题方法
5 . 如图,在四棱锥
中,底面
是正方形,其他四个侧面都是等边三角形,
与
的交点为O.
(Ⅰ)求证:
平面
;
(Ⅱ)已知
为侧棱
上一个动点. 试问对于
上任意一点
,平面
与平面
是否垂直?若垂直,请加以证明;若不垂直,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d30637da200a07672ae231b4c5c09cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(Ⅱ)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc6f6dfdbe7d39891c35f67e1a95c7f.png)
![](https://img.xkw.com/dksih/QBM/2010/5/10/1569723786174464/1569723791433728/STEM/d8b5dadf27624f869fe12c9235ec0d2e.png?resizew=247)
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2010·上海普陀·一模
6 . (文)已知等差数列
的公差是
,
是该数列的前
项和.
(1)求证:
;
(2)利用(1)的结论求解:“已知
、
,求
”;
(3)若各项均为正数的等比数列
的公比为
,前
项和为
.试类比问题(1)的结论,给出一个相应的结论并给出证明.并利用此结论求解问题:“已知各项均为正数的等比数列
,其中
,
,求数列
的前
项和
.”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd015442628054692b8cc0a19c77d2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0242e98ae52be08247a7cd2bafd806d.png)
(2)利用(1)的结论求解:“已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2639c64902dae0fc4d735e8020ea8e38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa561fcad46eaf8d841efa58fe9a8af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d16765bfe96c4c2733afdf4099a33f5e.png)
(3)若各项均为正数的等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.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/503d69ae8f4e42d5ca6fd003327f30fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2639c64902dae0fc4d735e8020ea8e38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa561fcad46eaf8d841efa58fe9a8af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0096ced57c6f31f2e0fe402bd56334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6f1af4b44b2e97e8f319bab4ae9010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34a901aa78366ac960f5f4e7f1fcbac.png)
您最近一年使用:0次
名校
解题方法
7 . 已知函数
.
(1)若
,讨论
的单调性;
(2)若曲线
在
处的切线与直线
垂直,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6cfe16275a7703fa5c7b7c910d10475.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512f4c29ff276b7f35052ad4cc255ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8559250e7a91f36fe7a8ec6ce6a1550f.png)
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名校
解题方法
8 . 已知数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)求证:
.
![](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/bf6565f4d7acc79ddff1ca545a1f01c0.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbdef3ea961cf33cc9a8ec9f4e72d76.png)
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名校
解题方法
9 . 已知函数
是定义在
上的奇函数.
(1)求实数
的值;
(2)判断
在定义域上的单调性,并用单调性定义证明;
(3)
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cbc2ed4bad6431037602fc427e6756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5667bc1ea875422f618529aa5f254f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08e9b1365d76a10c212db1c91c5f91f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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名校
解题方法
10 . 已知四棱锥
,底面
为矩形,
,
,
分别是
,
,
的中点.证明:
平面
;
(2)
平面
.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de22059d7d80f24817235269e9bb1ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8677ae5ca7acf874d93789425d172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
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