名校
解题方法
1 . 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)
您最近一年使用:0次
解题方法
2 . 已知函数
和
,
(1)若
,求
的值;
(2)若存在实数
,使得
成立,试求
的最小值;
(3)若
,对任意的
,
,都有
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6263576e5c3f2324a8dac311476bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b355e85d912b1f25ed1ca3b36e636784.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5998a43d6bb050f648b93c635c008dd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d09acdce3deb0bb066dca07aa96198.png)
(2)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a00e51c75b6db3cdc521cf77f361c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a074019a75a26e8d6b9147731a29a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0105d3297379e68f708a3ab8d64b6cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
解题方法
3 . 已知
,
,
,则
,
,
的大小关系( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/726a118721407cd3567c37211f7d4642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c525c03ab7683a72b2f067cfc288368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c1301251f5125d62021ab259f54700.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/071a7e733d466949ac935b4b8ee8d183.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 已知函数
为偶函数.
(1)求
的值;
(2)若
,判断
在
的单调性,并用定义法给出证明;
(3)若
在区间
上恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c619d25fca5ba6b0d20909b5a96914ac.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3cfdcaeb101a7a7e434b10102e5a4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96425bda56bbb42569b1fe47ba21d3dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337a23f9bf790be6e03b88fb2d03f18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
5 . 生物钟(昼夜节律)是生物体内部的一个调节系统,控制着生物的日常生理活动.研究显示,人体的某些荷尔蒙(如皮质醇)在一天中的分泌量会随着时间的不同而发生变化,从而影响人的活力和认知能力.假设人体某荷尔蒙的分泌量
(单位:
)与一天中的时间
(单位:小时,以午夜0点为起点)的关系可以通过以下分段函数来描述:
●在夜间
,荷尔蒙分泌量保持在较低水平,可以近似为常数
.
●在早晨
,随着人醒来和太阳升起,荷尔蒙分泌量线性 增加,其关系为
,当
时,分泌量达到最大值![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1e7f77c4297fbed97c37ebf492b53c.png)
●在下午和晚上
,荷尔蒙分泌量逐渐降低,可以用指数衰减模型描述,即
.
已知午夜时荷尔蒙分泌量为
,峰值分泌量为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a97437b6ca3463ab7a0017eb660ee6f.png)
(1)求参数
,
和
的值以及函数
的解析式;
(2)求该同学一天内荷尔蒙分泌量不少于
的时长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e91406484c332ac8fc96a54c7e187b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3fac814e1c648fd71c01e110d5c1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
●在夜间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e9155ddb70e05907745867d4f100ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082a96bf5a330006dd5c1af649707770.png)
●在早晨
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641ec9ed04accc9a3923000686a3667d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a80f648e64e65a72d99e4461d6f5d541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57127a1bae23a6d3a266ffae18601f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1e7f77c4297fbed97c37ebf492b53c.png)
●在下午和晚上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a03f8193f6bc7b48296312328d668e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82fd9f11c2c8ec2d514cb87ea572c61c.png)
已知午夜时荷尔蒙分泌量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b4fabe8266a844bdd40b88525d38a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a97437b6ca3463ab7a0017eb660ee6f.png)
(1)求参数
![](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/26e91406484c332ac8fc96a54c7e187b.png)
(2)求该同学一天内荷尔蒙分泌量不少于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d26a08806fc86a287073b740917fc2.png)
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解题方法
6 . 已知实数
为函数
的零点,
为函数
的零点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f947d030c265753e4201ae4d9c69e99.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0576a0520249b48fd302a0d47317678f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34516f09a665374834b1b165e1a43b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f947d030c265753e4201ae4d9c69e99.png)
您最近一年使用:0次
解题方法
7 . 已知函数
的定义域为
,若
,则以下一定成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da3a6d011679952771607b3a166676b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba04d88cbef846ffc8a86bb6ff89f8e.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
解题方法
8 . 设定义在
上的函数
满足
,
为奇函数,当
时,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f0d2a39035b8046045727e60443ace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e81e15b871dd32b2438ef8025bcc42d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eac2b31a19918895e5af2d316490e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459d1d8477fd46ece5a65d40e32b4bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab30faa78cc53c104f61b1cd906c365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7dec97c55a499d6b7120a07c4979f55.png)
A.1011 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 函数
,若
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2b1dca48474b915853776d814447aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ba392d3e708fd13634343e9e87a0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802b63bc47020528ee43be34ad045bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5b69176884bcdc4239d60a093ed7c3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
10 . 幂函数
的图象关于
轴对称,且在
上是减函数,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3996cdf44a2dff6d7ffb9da0f60a17f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次