已知函数
.
(1)若函数
存在最小值,求实数
的取值范围;
(2)若对
,
恒成立,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14e10d2cfd65e8a92cbdceb043c14bd.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8559250e7a91f36fe7a8ec6ce6a1550f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee690f6c68a4900d7b1ea967c7a410a.png)
更新时间:2020-05-25 17:45:08
|
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】设函数
.
(1)当
时,求不等式
的解集;
(2)若对任意
,
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab53ac44f5c899d5241314178b53f9a2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94cc25a7cf28ed096549fbae97fce40a.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
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(0.65)
名校
【推荐2】选修4-5 不等式选讲
已知函数
.
(1)解不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881f24963a864773a54b3f2f01b6158a.png)
(2)若函数
的最小值为
,且
,
,求
的最大值.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00af88112428d42b13ad4bafefdc2f1c.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881f24963a864773a54b3f2f01b6158a.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aedb503f6f65771e3d5c96c769016f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228032ab3d2ee82e5ecc9413aa13b3dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d993cf0a090de3b01f1dda52c6fdc9f.png)
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【推荐1】已知函数
,
,且
的解集为
.
(1)求
的值;
(2)若
都为正数,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b8412c7751ab5fdcfc2dad12f4acd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3ae6cf7b5d61ab8dfcbda377c9e11c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e06343b4506a3741b3469cbff39eb0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e92e8e0a8714aeabd594477a49f65cd.png)
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您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】设函数
,其中
.
(1)当
时,求不等式
的解集;
(2)若
,恒有
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a563fb98c595c308fd4f65825c2a9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e215bc817c9632e2682e8f8da2bd6635.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d4e7066166166f9734c6cff7d8436d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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