1 . 已知函数
,
.
(1)若
是奇函数,求a的值并判断
的单调性(单调性不需证明);
(2)对任意
,总存在唯一的
,使得
成立,求正实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c064cd16c1c95023009c344564a1022a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad0bcb38bd67c085ab01b13cf7a3e05.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3715365d7cf7959b963815c32327c4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30a4750430b4b0e9daa3edbef242184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
您最近一年使用:0次
2023-06-12更新
|
1354次组卷
|
3卷引用:专题4.6 指、对数函数的综合应用大题专项训练-举一反三系列
真题
2 . 已知
,
,
是实数,函数
,
,当
时,
.
(1)证明:
;
(2)证明:当
时,
;
(3)设
,当
时,
的最大值为2,求
.
![](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/b1bd0587f5d6a3b5db9e4a93e0dbc0ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634952be20c76e0701e80675318830fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6343069217cd6d8dd32446da428dae46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d026de72fab7e92f39f461e41be3a15.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad65bf2079957540f50eb71280ec3c46.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6343069217cd6d8dd32446da428dae46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91332074f41dd2bd2588b5fcb5f829e7.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6343069217cd6d8dd32446da428dae46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次
21-22高一·湖南·课后作业
解题方法
3 . 如图,某地为了开发旅游资源,欲修建一条连接风景点P和居民区O的公路.点P所在的山坡面与山脚所在水平面a所成的二面角为
(
),且
,点P到平面
的距离
.沿山脚原有一段笔直的公路AB可供利用,从点O到山脚修路的造价为a万元/km,原有公路改建费用为
万元/km.当山坡上公路长度为lkm(
)时,其造价为
万元.已知
,
,
km,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/bef28af2-56e0-49a9-af9a-0c8027246164.png?resizew=335)
(1)在AB上求一点D,使沿折线PDAO修建公路的总造价最小.
(2)对于(1)中得到的点D,在DA上求一点E,使沿折线PDEO修建公路的总造价最小.
(3)在AB上是否存在两个不同的点
,
,使沿折线
修建公路的总造价小于(2)中得到的最小总造价?证明你的结论.
(4)你能将上述模型进行推广,解决其他的实际问题吗?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e552716f71ddda6b1566fcb7eb11f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0503736d21c5e5432d933990cf511c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e44c9fc2c1027871b515ecae512697a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576833b76e9cad3b523f87132308df99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2efaee719378c9935f66457ea4ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48dc9c56c4d2ed0d3529460ef2cf8f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ac747fa7e033b09ab20370fd27d5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e4c39ba72d14560e283ad7f75353a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9f245074b6850c0d6ec9d07e9b8950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6647cc9d3aeabb2ebdb7e692351ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/bef28af2-56e0-49a9-af9a-0c8027246164.png?resizew=335)
(1)在AB上求一点D,使沿折线PDAO修建公路的总造价最小.
(2)对于(1)中得到的点D,在DA上求一点E,使沿折线PDEO修建公路的总造价最小.
(3)在AB上是否存在两个不同的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6003623c3413d3e2a3c1e41049fa31b2.png)
(4)你能将上述模型进行推广,解决其他的实际问题吗?
您最近一年使用:0次
名校
4 . 已知函数
(
为实常数且
).
(Ⅰ)当
时;
①设
,判断函数
的奇偶性,并说明理由;
②求证:函数
在
上是增函数;
(Ⅱ)设集合
,若
,求
的取值范围(用
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f99fcef3856a1d67acab12b85b5a4093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da67075d5f20954afe0232112e159ac9.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd88b374924344fb157a15c2d36edad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
②求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9006ed5e53e4637fbacec7832dfe2146.png)
(Ⅱ)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d56bb1ee8639cb81434e10cb3c9a0cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4815b1d16a7ae485ff0bba0b397e893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
您最近一年使用:0次
2018-11-01更新
|
842次组卷
|
4卷引用:专练29 期中综合检测AB卷-2021-2022学年高一数学上册同步课后专练(人版A版2019必修第一册)
(已下线)专练29 期中综合检测AB卷-2021-2022学年高一数学上册同步课后专练(人版A版2019必修第一册)【全国百强校】江西省新余市第四中学2018-2019学年高一10月月考数学试题浙江省2016年4月普通高中学业水平考试数学试题浙江省金华市第一中学2021-2022学年高一上学期期中数学试题