已知函数
,
,其中
.
(1)若关于
的方程
在
上有两个不同的实数根,求
的取值范围;
(2)若对任意
,总存在
,使得
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad694e587eac6c7bef7cf959d77679fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6169b1eb227399a03c16770464c9c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb2e46f49adba6036e2624639a1b966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9b81feb84ce1523ae97d5bff2c4072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d253fe532bea9ef63a4e87dff3d6c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07444159fdea87a306d2ea12cd6f027c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2019-05-31 16:20:25
|
相似题推荐
解答题-问答题
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较难
(0.4)
解题方法
【推荐1】已知函数
,
.
(1)当
时,求
的单调区间;
(2)若函数
存在两个极值点
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb847efdac5a3492900e9c54d19e210c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980a8c4eb822aeb591ceacfe8a7aaa11.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bc1807f5f5784e75c4e5e6df17f3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fe208f73fa35d3778032cc0208a0d8.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21f4aa7724e0c98a954e108ec2af0f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040135d64192de075ba0cc9f11ddbc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa33c2bd791339d32821077846605d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871ad929b12ad05e48cf7b640032c62f.png)
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解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】已知函数
.
(1)讨论函数
的极值;
(2)若
,证明:函数
有且仅有两个零点
,
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176f4028a391eec83be8a350a6d78824.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3020ab6f5f843d06fc059a406c2185d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d900314efb0e4cacb6e5de945b5397.png)
您最近一年使用:0次
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(0.4)
【推荐3】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7aef4abbaa656a427a6fb9fc8563911.png)
(Ⅰ)设两曲线
有公共点,且在公共点处的切线相同,若
,试建立
关于
的函数关系式,并求
的最大值;
(Ⅱ)若
在
上为单调函数,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7aef4abbaa656a427a6fb9fc8563911.png)
(Ⅰ)设两曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27dbc640aecfc1e7190812ffbe95377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4697f8dafb40a260ab6815c88d555e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a2b13d4eb8aaff7042dd6c54469f45.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
|
较难
(0.4)
解题方法
【推荐1】已知函数
.
(1)当
时,证明函数
无极值点;
(2)是否存在实数
,使得只有唯一的正数
,当
时恒有
?若存在,求出
,
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64af9e5b07167f4c7d171e08f7fffd2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec21cc884f6797dcf4799eecdd78d2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931868d0a400204bc227875a24766d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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名校
【推荐2】已知函数
,
.
(1)讨论
的单调性;
(2)若关于
的不等式
在
上恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b96f3f5c1b634412a7ef0bb584528e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0a48ff7093d758caaa6fa0804099ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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较难
(0.4)
【推荐3】已知
在区间
上是增函数.
(1)求实数
的取值范围;
(2)设关于
的方程
的两个非零实根为
.若不等式
对任意满足条件的实数
及
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8143cb04c50a5d37cfdd36434f610282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884465c19b0c0655285203098f66e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa55db94632392b83ceef9c3ec2da937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb735ff555cd2b35737d371baf35a0c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】已知函数
,其中
.
(Ⅰ)若存在
,使得
对任意
恒成立,求
的最大值
;
(Ⅱ)在(Ⅰ)的条件下,当
时,设
的取值范围为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dd0a26e2a364a9934c7446194b3d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(Ⅰ)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
(Ⅱ)在(Ⅰ)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350b903a1d648f0b1582024884ee942d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8401162537a63e6c48c066e9f5fcdf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0287f0975a1b7a04bc2495ebe828e447.png)
您最近一年使用:0次
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6a06ac2e5b33c81a6166133732b397.png)
,
(1)求当
在
处的切线的斜率最小时,
的解析式;
(2)在(1)的条件下,是否总存在实数m,使得对任意的
,总存在
,使得
成立?若存在,求出实数m的取值范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6a06ac2e5b33c81a6166133732b397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73576bdede7ab3cfa6d868f4b7c84a45.png)
(1)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)在(1)的条件下,是否总存在实数m,使得对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31395d2ed7dacaf20369a0eeabc2e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc0414f6c290d1dc3678ba41b4620f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626f73fe4e46045a195a8c5e09ae6e9a.png)
您最近一年使用:0次