解题方法
1 . 如图,在正方体
中,
为棱
上的动点,
平面
为垂足.给出下列四个结论:
;
②线段
的长随线段
的长增大而增大;
③存在点
,使得
;
④存在点
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
平面
.
其中所有正确结论的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c982eb645d77aa24c642fca6d72e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c49adfabb11c35a6e72cde3af1483b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82cbb7fec64ae746256923b1a9479c9.png)
②线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
③存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d643e10124279e8863fe3e21cba688b.png)
④存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048e39e4ac8a62a129b6816dd18902ea.png)
其中所有正确结论的序号是
您最近一年使用:0次
2 . 已知函数
.
(1)若
,
①求曲线
在点
处的切线方程;
②求证:函数
恰有一个零点;
(2)若
对
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd82845718b6b9f744deea1d9779c81.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
①求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea9824af71c9da5db5a00ec06063024.png)
②求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29268e34e4cafff25f64b398a635786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49a5dd2066c68b2fb5f16731013cfc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
3 . 设正整数
,
,
,这里
. 若
,且
,则称
具有性质
.
(1)当
时,若
具有性质
,且
,
,
,令
,写出
的所有可能值;
(2)若
具有性质
:
①求证:
;
②求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c53838698bdce4bdfcddb756b60f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30f859c1ac6d40ecd3660efd6639b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b0e3b00fe47801afb53ec56706c21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef463abd621083c32b0a43fd95373ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14fb04e3704e9e0bc2a610815f29f09f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252bab154aa5bdc9b4bce4c0d43aaf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6fa157b4f65f3a9aa1f7f82de02e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6831ec7292bd1e0fc7e21efb4d82357b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252bab154aa5bdc9b4bce4c0d43aaf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9171aebb446d064b05a8c9513b77713.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dbb2d69dacbf149f01a3e98b33f8e01.png)
您最近一年使用:0次
4 . 某生物兴趣小组在显微镜下拍摄到一种黏菌的繁殖轨迹,如图1.通过观察发现,该黏菌繁殖符合如下规律:①黏菌沿直线繁殖一段距离后,就会以该直线为对称轴分叉(分叉的角度约为
),再沿直线繁殖,…;②每次分叉后沿直线繁殖的距离约为前一段沿直线繁殖的距离的一半.于是,该组同学将整个繁殖过程抽象为如图2所示的一个数学模型:黏菌从圆形培养皿的中心O开始,沿直线繁殖到
,然后分叉向
与
方向继续繁殖,其中
,且
与
关于
所在直线对称,
….若
,为保证黏菌在繁殖过程中不会碰到培养皿壁,则培养皿的半径r(
,单位:
)至少为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a02946f2d73ba2e050d212fa559ff59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1434af18d74e4dd3f09f61c6fa8d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce9d40adaecd9741d39abc0b3690431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ac6555523083b9a348875a05089432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f03a3e00f412ca32911d6c0bcc35dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3e811119f0e1b8112b2e01828012a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7d42b80ee7dbebb5fe8283c652fbb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f830e1274c64626fa9d033e8b5597c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c6006ca24698fe64f447744152e562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142ca1ff5f26dc668c27ae77e7c366b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
A.6 | B.7 | C.8 | D.9 |
您最近一年使用:0次
2024-04-09更新
|
1371次组卷
|
3卷引用:北京市海淀区2024届高三下学期期中练习(一模)数学试题
名校
5 . 已知函数
.
(1)求
的单调区间;
(2)若函数
存在最大值,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22983b32eb20322c3cf319ba7057672f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea30648000de972315baaebe4bdedad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2024-04-09更新
|
1312次组卷
|
2卷引用:北京市海淀区2024届高三下学期期中练习(一模)数学试题
6 . 已知椭圆
,与x轴不重合的直线l经过左焦点
,且与椭圆G相交于
两点,弦
的中点为M,直线
与椭圆G相交于
两点.
(1)若直线l的斜率为1,求直线
的斜率;
(2)是否存在直线l,使得
成立?若存在,求出直线l的方程;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee9bf239ca3358337211814792ecd82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c29a7e8eea08197bf53164a560bee58.png)
(1)若直线l的斜率为1,求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
(2)是否存在直线l,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b92ccbdaac73bf6724b0f85852a09e30.png)
您最近一年使用:0次
名校
解题方法
7 . 已知动圆过点
,且被
轴截得的线段长为4,记动圆圆心的轨迹为曲线
.过点
的直线
交
于
两点,过
与
垂直的直线交
于
两点,其中
在
轴上方,
分别为
的中点.
(1)求曲线
的方程;
(2)证明:直线
过定点;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99296bab1b42898e7ca336a822510258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764c199d659322854377a92fee97642d.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2024-03-14更新
|
910次组卷
|
3卷引用:北京市海淀区首都师范大学附属中学2023-2024学年高三下学期开学练习数学试题
名校
8 . 设
为正整数,集合
. 任取集合A中的
个元素(可以重复)
,
,
,
,其中
.
(1)若
,
,直接写出
;
(2)对于
,
,
,证明:
;
(3)对于某个正整数
,若集合A满足:对于A中任意
个元素
,都有
,则称集合A具有性质
. 证明:若
,集合A具有性质
,则
,集合A都具有性质
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ffdb6f5f778ef4042ebb34676a01d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da0b0e5b6a848ebf56dc9b322439516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e58913298f228485834ce1a2cdeba90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97565c23be7ddbaa8d5d0a79306b7802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b71876e8c49840f701497ef410cc604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52f8aaa7e6e6cff822f11234f76c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ab695c730d189001bc892560da77a4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4786f5726f9ea2fbec6989c316a8a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5d37f320c9735b578f7edf5735c696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc42f408e8973e0f39d09ba3c8d8bea7.png)
(2)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab46ece2bf2e8fd7155e0d5cb96a1300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f56b4669ea734f330fc1a0138e17a8.png)
(3)对于某个正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2def5aa62f497709e1bd8258583d62fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898ee117eaceffb2cdc39941f53d2d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a904c68cfc09c7702602d18d3fc555a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6291d7b91f71daa0b3c4fa02dc7a5ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/899237334c87274dec572e039f5c9521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c619c428e95993872569147b7ea83cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b78297a65e7fad69635b19928ecc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6291d7b91f71daa0b3c4fa02dc7a5ea.png)
您最近一年使用:0次
名校
9 . 已知数列
满足:
,当
时,记
,
. 给出如下4个结论:
①
;
②当
,数列
是递增数列;
③当
时,存在正数
使得
;
④集合
.
其中正确命题的序号是_____________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137b6d631154f8168c24392b1ac7877b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e8f0be7c95da25ea43651ccd1be9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2132d3e34d67f365a2ca865f06e4cad5.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/690af67e931cb1ede3b8621381533381.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfe735337dbdc8d03ffd256dcf0d745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bccd1cd197fe11142eff07cce9244c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74f1527e334b30f6c447a67945ef3d5.png)
④集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5560778cd081af25e0c8d0223d2f3e07.png)
其中正确命题的序号是
您最近一年使用:0次
10 . 已知函数
.
(1)当
时,求在点
处的切线方程;
(2)若函数
在
上单调递增,求实数
的取值范围;
(3)当
时,讨论函数
零点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79070c8de6d379f677ae1a198a87892.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302337058242c7b78e3eb4ac7210b7ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2af774a1848449d517639962875d53a.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cd57d7c4ce652ab9571b04dab4ec99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e92a925d9fdb33356667ac63dc88cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35be92b1df0ec8cb8a69b4724c7f382c.png)
您最近一年使用:0次