真题
名校
1 . 设A是由m×n个实数组成的m行n列的数表,满足:每个数的绝对值不大于1,且所有数的和为零,记s(m,n)为所有这样的数表构成的集合.
对于A∈S(m,n),记ri(A)为A的第ⅰ行各数之和(1≤ⅰ≤m),Cj(A)为A的第j列各数之和(1≤j≤n):
记K(A)为∣r1(A)∣,∣R2(A)∣,…,∣Rm(A)∣,∣C1(A)∣,∣C2(A)∣,…,∣Cn(A)∣中的最小值.
对如下数表A,求K(A)的值;
(2)设数表A∈S(2,3)形如
求K(A)的最大值;
(3)给定正整数t,对于所有的A∈S(2,2t+1),求K(A)的最大值.
对于A∈S(m,n),记ri(A)为A的第ⅰ行各数之和(1≤ⅰ≤m),Cj(A)为A的第j列各数之和(1≤j≤n):
记K(A)为∣r1(A)∣,∣R2(A)∣,…,∣Rm(A)∣,∣C1(A)∣,∣C2(A)∣,…,∣Cn(A)∣中的最小值.
对如下数表A,求K(A)的值;
1 | 1 | -0.8 |
0.1 | -0.3 | -1 |
(2)设数表A∈S(2,3)形如
1 | 1 | c |
a | b | -1 |
求K(A)的最大值;
(3)给定正整数t,对于所有的A∈S(2,2t+1),求K(A)的最大值.
您最近一年使用:0次
2016-12-01更新
|
2636次组卷
|
2卷引用:2012年全国普通高等学校招生统一考试理科数学(北京卷)
11-12高三上·北京·期中
解题方法
2 . 设等差数列
的公差
,且
,记
为数列
的前
项和.
(1)若
成等比数列,且
的等差中项为
,求数列
的通项公式;
(2)若
且
,证明:
;
(3)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711cb94d1812369aa4b34da26240bcce.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)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ad29870419d1ca48b69c128fd18b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e09e5d73c13f4320344a88316556fdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492b6d3883713fcaa8a4fdd87b87b480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03572b170178d2f675ee43d4eae7e2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994b2b0e9cfdf45933f6425693ddf4d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5539bdee68b5b31f07b9159be844094a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a0f5af5d9b850baa554794f3d0c898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd514ada2253613f7401286f1e1590a4.png)
您最近一年使用:0次
12-13高三上·北京西城·期末
名校
3 . 已知数列
:
,如果数列
:
满足
,
其中
,则称
为
的“衍生数列”.
(1)写出数列
:
,
,
,
的“衍生数列”
;
(2)若
为偶数,且
的“衍生数列”是
,证明:
;
(3)若
为奇数,且
的“衍生数列”是
,
的“衍生数列”是
,….依次将数
列
的首项取出,构成数列
:
证明:
是等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa79f2092161050c26653fd3b0e91c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b99482bf9304775db108da8bb7f25ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7e6327ecd86c682863f4a89e619fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da65bfc5919df189631c53048808e4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f663a1cdb8a4e16db40b87f7abcd598c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
(1)写出数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e47cd514b2920609e3781c87df6ab70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a821e643d5fae24caed0faa6d423dad6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a84a765c0049c6d0ce44846cb59f5b1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810c5873069999d8e981e5d692e53f75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab88237c7e53c0c80a7021a06cf8d55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
您最近一年使用:0次
12-13高三上·北京西城·期末
4 . 已知数列
.如果数列
满足
,
,其中
,则称
为
的“衍生数列”.
(Ⅰ)若数列
的“衍生数列”是
,求
;
(Ⅱ)若
为偶数,且
的“衍生数列”是
,证明:
的“衍生数列”是
;
(Ⅲ)若
为奇数,且
的“衍生数列”是
,
的“衍生数列”是
,….依次将数列
,
,
,…的第
项取出,构成数列
.证明:
是等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d620a71a9448d3a5be7fd8d5fea7094e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad083576ed8ff766b6d7c2a59a1c448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7e6327ecd86c682863f4a89e619fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da65bfc5919df189631c53048808e4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7304f4a3860fb2ce6535b51166d21446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
(Ⅰ)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/232a4957e93a83aa5f3dd7215b9be594.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5be81852e6ae92135ad336a919e601c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e47cd514b2920609e3781c87df6ab70.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
(Ⅲ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0016748ebec31c2f1bd490cb53994536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ab198a23f10c51c5796772e9147305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefcd32ac3e94ba73126ab1c29f0dda2.png)
您最近一年使用:0次
2016-12-01更新
|
1164次组卷
|
3卷引用:2012届北京市西城区高三上学期期末考试理科数学试卷
5 . 若数列
满足
,数列
为
数列,记
.
(1)写出一个满足
,且
的
数列
;
(2)若
,
,证明:E数列
是递增数列的充要条件是
;
(3)对任意给定的整数
,是否存在首项为
的
数列
,使得
?如果存在,写出一个满足条件的
数列
;如果不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786d6bfda2130196e2050c0439de7897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f269e4e96c27fc6538af64a5a54a023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1ec142aee1bd8b3fe42687b346b462.png)
(1)写出一个满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230af4df0d4a02ba90ed01feed036650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86d0bbe420c44e9526776a3fb2d5cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8827c05075967f3c3569d31cb6b83919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58777a9c14f76127552af0906eeeaf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ca967d2f5ea038668c650881de0dfc.png)
(3)对任意给定的整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f27f84764f1cca89ce3d93fc1cf603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89726ddaa0e0b461bebe2efc831b0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
您最近一年使用:0次
2016-11-30更新
|
2670次组卷
|
3卷引用:2011年普通高中招生考试北京市高考理科数学
2011·北京顺义·二模
解题方法
6 . 已知椭圆
的左,右焦点坐标分别为
,离心率是
.椭圆
的左,右顶点分别记为
.点
是椭圆
上位于
轴上方的动点,直线
与直线
分别交于
两点.
(1)求椭圆
的方程;
(2)求线段
长度的最小值;
(3)当线段
的长度最小时,在椭圆
上的
满足:
到直线
的距离等于
.
试确定点
的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10f5be271d5e18347e2792d348e5411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11b141148d19998c842aee2e5b1de63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4670dc40e366188fa7e441fe61046fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77e9c89b7275b0c1a9af5c9a72e5968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821309f088a175c00dc0f4828334503d.png)
试确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
您最近一年使用:0次
2010·北京东城·二模
解题方法
7 . 已知函数
(![](https://img.xkw.com/dksih/QBM/2011/12/6/1570558215954432/1570558221664256/STEM/6074b4e231684d38ab7d56841b3f830d.png?resizew=45)
(1)若函数
在定义域上为单调增函数,求
的取值范围;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3c510cecf1304a147ad6a5ff8ab0c4.png)
![](https://img.xkw.com/dksih/QBM/2011/12/6/1570558215954432/1570558221664256/STEM/6074b4e231684d38ab7d56841b3f830d.png?resizew=45)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33001e4614a487fc879dfed3e24b8d53.png)
您最近一年使用:0次
真题
8 . 若
为常数,且
.
(1)求
对所有的实数
成立的充要条件(用
表示);
(2)设
为两实数,
且
,若
,求证:
在区间
上的单调增区间的长度和为
(闭区间
的长度定义为
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089e791569ccbc56a3fca4781c16965c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec09e7ab26188617083f3b467231250.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8c97a77335a5dc082b1e99154eee37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3c5a4887dfe02b02ee90d740151e1d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f92ba9f2cf267c946ff378c0a21f3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f94345694d4215284c41f87146795ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ffcddd15cefbf62ef3b3cb40b0cc12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b85a97933a1d984f6e484b4021c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64da75a02173c2a5eb40f4c68d0f4f36.png)
您最近一年使用:0次
2016-11-30更新
|
1699次组卷
|
3卷引用:2012届北京市东城区普通高中示范校高三12月综合练习(一)理科数学
9 . 已知椭圆
的离心率为
,且过点
.若点
在椭圆
上,则点
称为点
的一个“椭点”.
(1)求椭圆
的标准方程;
(2)若直线
与椭圆
相交于
两点,且
两点的“椭点”分别为
,以
为直径的圆经过坐标原点,试判断
的面积是否为定值?若为定值,求出定值;若不为定值,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449f10aa5bbac8de9568bf2682fd6325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de261e9b4defbc0be6440397031a87b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3511cdc6a9b56bc1d9415d3d94ef0f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a8b4d8f329e5f702d3fee62737d047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a54a7c710617cc490aaccf4bd0fa9f13.png)
您最近一年使用:0次
2016-03-10更新
|
1457次组卷
|
4卷引用:北京市朝阳区第80中学2017届高三上12月月考数学试题