已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7fee47da39abf73f6d0e86f7c2bf325.png)
(1)
时,若
恒成立,求
的取值范围;
(2)
,
在
上有极值点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c48ea0f27d6d49c82f3737170b0cdb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7fee47da39abf73f6d0e86f7c2bf325.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc64eaf4cd6737b000b28f1fcdd16c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234a31eb46e97dead9d999f7ecaee467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42ea4deb0b51db50b3330c26a2a825d.png)
更新时间:2023-02-08 16:59:21
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解答题-证明题
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适中
(0.65)
名校
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/517a7d3c2c7bb7a19aa4167bfdf94c9a.png)
(1)当
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(1)当
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(2)当
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【推荐2】已知函数
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(1)若
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名校
【推荐1】已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd27ceb61cbe46f92822908bf358675e.png)
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(Ⅱ)证明:当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd27ceb61cbe46f92822908bf358675e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8abe175a461f021d958980647ba2268b.png)
(Ⅱ)证明:当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee21db6628e4db3f5831370549fa96b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
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【推荐3】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d06e3c6a7628ad5724c6f447c471e31.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
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