已知函数
,若同时满足以下条件:①
在D上单调递增或单调递减;②存在区间
,使
在
上的值域是
,那么称
为闭函数.
(1)若
,判断
是否为闭函数;
(2)如果
是闭函数,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f69a10dd74a5189353a5db9d5828ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40ee87e42cc88a4fdf1d21bf61781224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f69a10dd74a5189353a5db9d5828ac3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc1cc4a137a37559547bc96bebdd024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a37ab31b9e00f7a9daf06e958b2d0ea.png)
更新时间:2021-04-05 19:42:33
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】已知函数f(x)=ax2+bx+c(a≠0)满足f(0)=0,对于任意x∈R,都有f(x)≥x,且
,令g(x)=f(x)﹣|λx﹣1|(λ>0).
(1)求函数f(x)的表达式;
(2)求函数g(x)的单调区间;
(3)当λ>2时,判断函数g(x)在区间(0,1)上的零点个数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c89c7f9879e66fcefc43ce384ff3615.png)
(1)求函数f(x)的表达式;
(2)求函数g(x)的单调区间;
(3)当λ>2时,判断函数g(x)在区间(0,1)上的零点个数,并说明理由.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】函数
.
(1)若
,且
,试求实数b,c的值;
(2)设
,若对任意
有
恒成立,求b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1766b3735935e68550f6d26ddbc3d5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4561e662151983a27b3e8c8fcc857f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1079bd320693191f50199306cbfd1388.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05adfa1f46f8d2eb486991e61b727f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608f663c358464a380cb503e362c2a2b.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】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
解答题-问答题
|
较难
(0.4)
【推荐1】已知函数
,
(
)
(1)若函数
存在极值点,求实数b的取值范围;
(2)求函数
的单调区间;
(3)当
且
时,令
,
(
),
(
)为曲线y=
上的两动点,O为坐标原点,能否使得
是以O为直角顶点的直角三角形,且斜边中点在y轴上?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6856a67fcb9a0f4b2cb74914bd9f13ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd9dfe838494badae6836fdd7376294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de648cd39338d48f2d22eb82a77b4839.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b917df0520097be222accbddf9394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eda48853e8bdb7e266370b4e0d5a258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272dd5b2c68184ca5f6f19f28a5cb184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3fe11d03b990cf8d7ab46053c76a6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e083d509ccb4aefc6ecf9962939c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d138d053f5cf5a9d3b521d95010abc67.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b0d04c0b7097a61907ad2f1f7bc52ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b0d04c0b7097a61907ad2f1f7bc52ba.png)
(1)若函数在区间[0,1]上存在零点,求实数
的取值范围;
(2)当时,若对任意
∈[0,4],总存在
∈[0,4],使
成立,求实数
的取值范围.
您最近一年使用:0次