已知函数f(x)=|x-1|.
(1)解关于x的不等式:2f(x)+f(x+2)<4.
(2)若对任意|x|≥4,都有
成立,求实数a的取值范围.
(1)解关于x的不等式:2f(x)+f(x+2)<4.
(2)若对任意|x|≥4,都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d423249a0ac30ee751236d641d2eff3.png)
更新时间:2020-05-07 09:29:53
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】设
,函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/744f9af919ae1955c13f35050c63e3ae.png)
(Ⅰ)当
时,求函数
的最小值;
(Ⅱ)若
,解关于
的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/744f9af919ae1955c13f35050c63e3ae.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a6676c636cf9b21e882075962ecebf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256f3981024e53f373a80aad40e994ae.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知函数
.
(1)求不等式
的解集;
(2)若
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795c1846758fa03ce1d1f803e4885345.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66d61d5f66d68b4c4a2a25fd7103621.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ffa2c52fc267988f4ff6a998d9a0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐1】已知函数
和
.
(1)若
,画出
的简图并解不等式
;
(2)若
的最小值为
,求a的值;并求出满足不等式
的k的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344acf362fd44b57b4d2a16667d5654d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eae9b89e1afac429600893d9965af7e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d3a118a8864e2191fce12f9dcc2233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de0fb6a05a00e69c861cbc5c00a8acc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf6dfee4181b3df1eb44e754df4861a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b2eafa0279a46de2a1cfa5efde305d.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】设函数
.
(1)当
时,求函数
的最小值;
(2)若
对任意实数
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8ed6aebf9ddf9151e2f5c2c0ad179a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c035395e635cb4b7c90f6d54a44ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次