已知函数
.
(1)当
时,求
的单调区间;
(2)若
有三个极值点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc34ca68ac130d5ec9565c436521f33.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a171524b7ee6514e486caa45d08833f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2022-07-21 16:23:07
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【推荐1】已知
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【推荐2】已知函数f(x)=x2+xsinx+cosx.
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【推荐3】已知函数
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(1)当
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①求
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②求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf87c80c4d518ee7c8eaa72e7b0f1e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d75c3e6d9ade5b265f2cae523f6a00c4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e141c53bd594fc81d55f7591e8f6dd57.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032e8dc00cdc96860c9cbf8ac09677fc.png)
①求
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②求
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解题方法
【推荐2】设函数
,
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为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ef26ac870ad22064613d1ee52f152a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29e553ab87e8ed831f52e070fa5347d.png)
(1)若函数
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(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1991506535a4eab9ff27130e1c4d8122.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
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【推荐3】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e18b7bacf78209c2b6e1e4932ad1ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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