已知函数
,其中
为常数.
(1)判断函数
的单调性并证明;
(2)当
时,对于任意
,不等式
恒成立,求实数
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/190e14b0e4c169c1943b52948bf1cd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24aa16b780156e18f12baa2b8ee0f9a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006733482c2b44a155d47232facef45e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2020-09-06 10:04:13
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知函数
.
(1)若函数
, 判断
的奇偶性并加以证明;
(2)当
时, 先用定义法证明函数
在
上单调递增;
(3)若对任意
,都有
恒成立,求实数a的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d2149738bc31036c4d102b4f43ceb3.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61f235c3a4f5c62f85b5eaccdd38d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03db4ea1dcb63b22cf4e917df5db581e.png)
(3)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c867b551ca4681b993da05c4e93a1bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d594a2f04a0a87b81c20088b95e417c2.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】函数
.
(1)若
,证明:函数
在
上单调递增;
(2)在满足(1)的条件下,解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11a1e9222ca58eb7d58fadd5c790168.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda591d3909af06eabf6b37c65bfe571.png)
(2)在满足(1)的条件下,解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec1435a06c07028c38c49e76d698225.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】已知函数
.
(1)求证:
是奇函数
(2)若
.求证:
在
上是增函数
(3)当
时,对于
恒成立.求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1371f3e6c7ad311aeaee9619ea88bb67.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b92112b6b831fe057f43a83433e3ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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1】已知定义域为
的函数
对于
,
,都满足
,且当
时,
.
(1)求
,并用定义法判断
在区间
上的单调性;
(2)是否存在实数k,使得关于x的不等式
,
恒成立?若存在,求k的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4a2b3998705e51dbade9ada0873b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6593a700bf3e89107556454666b787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e20628ae49696ef64df6698c972ec7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02ee2a1cb7cf7654aa6050ca20fab16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb9feeffdbbd6eef8b9c8a61aeb3ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8636ae03db4eaa9c8d413a001cf39c9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486e282537cf72c6908f7ecfa4ef4cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4a2b3998705e51dbade9ada0873b2b.png)
(2)是否存在实数k,使得关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d6c7eed76ea8b1b68f08cbe8de89d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95ab6ce2369fa5338d1fa5589bfbc96.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,求使
的
取值范围;
(2)若
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c30cba8980f10c3a9870bd6ec84269.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86304c3e26200299a0480641525a283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28280ea1a2aabb7f4d1f7fa6f44a7e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963944f56ec874fccc3282b0d3ff941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f2416d1f75a45a314331146550832e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】已知函数
的定义域为R,对任意的
都满足
,当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(1)判断并证明函数的奇偶性
(2)判断并证明函数的单调性
(3)若
对所有的
均成立,求m的范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f10354561764c37c4a3bbc73c0b79c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09afef92103c0a6e96b24f27314fd805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(1)判断并证明函数的奇偶性
(2)判断并证明函数的单调性
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c14c59bfb860a31ea3c3e86f1010684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd0f1e3e3b41948f1b3d287c4b0cb44.png)
您最近一年使用:0次