名校
解题方法
1 . 甲乙丙三人计划本周六去桃花源景区游玩.现有甲、乙两人都住在
地,打算同时徒步从
地出发赶往
地,甲不经
地直接匀速前往
地,他的速度(单位:千米/小时)范围由函数
,
决定:由于丙不认识路,所以乙经
地接到丙后前往
地,速度为
千米/小时,此间乙在
地停留
分钟,其中
千米,
千米,
千米,如图.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/8849596c-56f0-4629-942a-3fc9ea40d363.png?resizew=138)
(1)求
的取值范围;
(2)甲、乙到达
地后原地等待,为使在
处互相等待的时间不超过
小时,甲的速度
中
应控制在什么范围内?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9944fa15265c94ab4b62d9482c50cf12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08a9f03807728b902a8b4486550e370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b184c94e38f1e5dbe750b2168c2a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a927a294d3d7119b54427b195b6dac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/8849596c-56f0-4629-942a-3fc9ea40d363.png?resizew=138)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e256ffedf7b1835be1b2d949b2f3d12f.png)
(2)甲、乙到达
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e256ffedf7b1835be1b2d949b2f3d12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
名校
解题方法
2 . 关于
的不等式
,
.(1)当
时,不等式
解集是___________ .
(2)若不等式
对任意
恒成立,则实数
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8d82dc49811bb9ed962cf5a934c636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8d82dc49811bb9ed962cf5a934c636.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8d82dc49811bb9ed962cf5a934c636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6330540758a21f46fc7a6d1e6328d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次