已知函数
.
(1)求
的值;
(2)用定义证明函数
在
上为增函数;
(3)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bff23e4fe691548f2c14627dc80d936.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4474bd87c00ac3ee99ab366527ded109.png)
(2)用定义证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b61bb7cb94b4d06f0090df1e365667.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e1243fbb07803eedf722224c3ec467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
更新时间:2023-11-10 18:22:31
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解答题-问答题
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适中
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解题方法
【推荐1】已知二次函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adfd30f0c7bfd742219db832c917f7aa.png)
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【推荐2】设实数,
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(1)求
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(2)求不等式
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(3)若存在
,使得
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,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027e41c3991aa6d981957f244153a812.png)
(1)求
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(2)求不等式
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(3)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd423a80d5b6fea8753fa1813cfbcc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0f2c5504947cb93a136a807554abdd.png)
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解答题-证明题
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【推荐1】若定义在R上的函数
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,
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(2)求证:
为
上的增函数;
(3)若
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,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673207f6b77b8192d25463d071737b7c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857e07c5fb7f2410d6d267a00889db10.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5485dbf2af203775f17c47d00595c3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87cd4403487962c38c8707ba3ab3fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f832d9cca2d5c9d76d38374e2a258d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d9e7a4af65844b19fd5d5a71017eaf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2b3de4cf642f247a9aa1cb56f57f51.png)
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【推荐2】已知定义域为R的函数
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您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐1】已知函数
对任意实数
都有
,且
时,
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(1)证明:
是奇函数;
(2)证明:
在
内是增函数;
(3)若
,试求x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0c6f119137e1b6760d55956d99d963.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2372f424431ce7b547a66b7d61d75421.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc753ef46ba4962b397aaf3b2400c8a.png)
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适中
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解题方法
【推荐2】已知函数
是偶函数.
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(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fd8ba601f455e8e13edc8c9ee4be90.png)
(2)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6b40a19ee34c54f8ded82105bf1d71.png)
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解题方法
【推荐3】
是定义在
上的函数.
(1)证明;函数
在
上是增函数;
(2)判断并证明函数
在
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(3)解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0b39fb4e708d68fd4bc46c390ae484e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
(1)证明;函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
(2)判断并证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
(3)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a669b7345ccfe4cfbe6de2765f1fd74.png)
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