名校
1 . 已知函数
,设方程
的根从小到大依次为
,则数列
的前n项和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd315aadd9dea369f3dc03dd277f489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d1434c675db847cb68eda036f9d7c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0961a558eecf20535808e15333cdfc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3998deeec91b7dc0f51977d3254b1954.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
1247次组卷
|
2卷引用:2015届河北省石家庄市高三下学期二模考试文科数学试卷
名校
2 . 今有苹果
个(
),分给10个同学,每个同学都分到苹果,恰好全部分完.第一个人分得全部苹果的一半还多一个,第二个人分得第一个人余下苹果的一半还多一个,以此类推,后一个人分得前一个人余下的苹果的一半还多一个,则苹果个数
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65580e670b8b60c603903641609bdb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.2046 | B.1024 | C.2017 | D.2018 |
您最近一年使用:0次
2017-04-14更新
|
869次组卷
|
2卷引用:2017届江西省吉安一中、九江一中等八所重点中学高三4月联考数学(文)试卷
3 . 已知函数
,
,设函数
,且函数
的所有零点均在区间
内,则
的最小值为
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572470528032768/1572470533660672/STEM/6a3d4a53747742828335e0639c6f40fa.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572470528032768/1572470533660672/STEM/00dcb6a233c442df9bc930b908c14a79.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572470528032768/1572470533660672/STEM/1178e4e5e3b944c8a4b2100d67745032.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572470528032768/1572470533660672/STEM/c1f178baef654254a3bc0e5326bb9c39.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572470528032768/1572470533660672/STEM/614dd2a9b1dc43108fa3f5f312366423.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572470528032768/1572470533660672/STEM/0a854df3acaf45e8a9c59f8c296fcb70.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 设数列
首项
,
为
的前
项和,若
,当
取最大值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38685aad9bfde59bf99d48e531c314df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/cefc9997db8203923cf125443bd493da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
A.4 | B.2 | C.6 | D.3 |
您最近一年使用:0次
5 . 如果有穷数列
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
满足条件:
,
,
,
即
,
我们称其为“对称数列”.例如:数列
和数列
都为“对称数列”.已知数列
是项数不超过
的“对称数列”,并使得
依次为该数列中连续的前
项,则数列
的前
项和
所有可能的取值的序号为
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d052ce4296b755bbb57bd93177705889.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea642ddfd41cba5c0889dfba39f0b6b1.png)
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e704576fec8a5795b6847d5d68757851.png)
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c4b10040cdf344331c2ef4a4bd2363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fc82353331abee0828dee9b38c08f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd94aeeecf0123921d4aef51c5defcf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341bd4ff68347b38c8e3f9e5a3b665dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692f0652866d5e18fa597d40bfc3cac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22fc26a14e8e5987688565881fb71e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cecc3d59296521ff4e1edc78a4ea67d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2165779a6796a859638e1edbfbcda31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c42e1413830f2cafb59de0a8bf7fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f435a4a4ecf15453a8f7a683cecd6241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6315a20e3ecd1768ae381e2a87610bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e91081300bc89368da216c266a67031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b8edd8ae66f7e9e7b09461012a6c78.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d052ce4296b755bbb57bd93177705889.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea642ddfd41cba5c0889dfba39f0b6b1.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e704576fec8a5795b6847d5d68757851.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c4b10040cdf344331c2ef4a4bd2363.png)
A.①②③ | B.②③④ | C.①②④ | D.①③④ |
您最近一年使用:0次
解题方法
6 . 已知
,
,
,则函数
,
的各极大值之和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e6e694a57dbe2bd441a7b85ba31414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd92edb1737107b8b5c75a0f17cd1cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d0e1d459420ca465ba19df3099519e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f91a00d8ebdc69d1b456a26ab0b3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dacc77cc8110cc0dfb639f7ffdd9fc4f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
7 . 已知数列
不是常数列,前
项和为
,且
.若对任意正整数
,存在正整数
,使得
,则称
是“可控数列”.现给出两个命题:①存在等差数列
是“可控数列”;②存在等比数列
是“可控数列”.则下列判断正确的是( )
![](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/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec813921f5c8816d437808a5f7b5abb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.①与②均为真命题 | B.①与②均为假命题 |
C.①为真命题,②为假命题 | D.①为假命题,②为真命题 |
您最近一年使用:0次
8 . 作边长为6的正三角形的内切圆,在这个圆内作内接正三角形,然后再作新三角形的内切圆,如此下去,则前n个内切圆的面积之和为( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
9 . 数列
的前n项和为
,若数列
与函数
满足:①
的定义域为
;②数列
与函数
均单调增;③存在正整数
,使
成立,则称数列
与函数
具有“单调偶遇关系”.给出下列两个命题:( )
①与数列
具有“单调偶遇关系”的函数有有限个;
②与数列
具有“单调偶遇关系”的函数有无数个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd70bc89bcebe10b16931b1e654d211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
①与数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e439697572e2dbd6826f7743b969813.png)
②与数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a97e99f49ad1998d2858e1963aa45de.png)
A.①②都是真命题 | B.①是真命题,②是假命题 |
C.①是假命题,②是真命题 | D.①②都是假命题 |
您最近一年使用:0次