解题方法
1 . 设函数
.若对任意的正实数
和实数
,总存在
,使得
,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c45aebb080eb52d94a41d3457b27968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af19c6415596218faa7dd1a83126c00a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09fa08ec15578dc4d8fb4712fdcdee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 设函数
,其中
.
(1)若
在
上有最小值, 求实数
的取值范围;
(2)当
,
时, 记
,若对任意
,总存在
,使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ecd190b7839ee2c08ea2dc73c5c37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38484efe606b3bdecf81343e2bed9a3a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/548636534994cd465dfc7bf7dd41505b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b64ddc79e44eb06c2e873ad5c0ec2d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b06387179d53c1e474fcfcb408b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee8cc226990d52adf55ecf17a22c523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734cd12f8f5f63a3adc0542bd772155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b1efb69ca9bd880766325ede3799c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80bc9ba57ceac1f13ec0d34ac5a64f82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00dc8066b515fd061c1b5d98408d782c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
您最近一年使用:0次
2016-12-05更新
|
922次组卷
|
3卷引用:2016届浙江绍兴柯桥区高三二模文数试卷
3 . 已知函数
,记
的解集为
.
(Ⅰ)求
;
(Ⅱ)已知
,比较
与
的大小.
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572543562514432/1572543569174528/STEM/50a30c239ec5420baf408e001bcc3233.png)
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572543562514432/1572543569174528/STEM/ca920f30c7ad434494da35058372da23.png)
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572543562514432/1572543569174528/STEM/2f4c1f9d20624c3095de9d6ef2e6bccd.png)
(Ⅰ)求
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572543562514432/1572543569174528/STEM/2f4c1f9d20624c3095de9d6ef2e6bccd.png)
(Ⅱ)已知
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572543562514432/1572543569174528/STEM/3a4eb9cc001b4832b7a404219308d91f.png)
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572543562514432/1572543569174528/STEM/fe1148e51aba458ca541a45935294ff0.png)
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572543562514432/1572543569174528/STEM/4443dea64e58492dbd22597454ba6e5e.png)
您最近一年使用:0次