设函数
,
,
是自然对数的底数.
(1)若
,求函数
的极值;
(2)当
时,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bf6e6b594c4139b08f21d54cfc84b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b767c33d36acbb9b5110ad0652237652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603d70656faabaef4a3ed4c0cf487da8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
2023高三·全国·专题练习 查看更多[2]
更新时间:2022-07-22 19:26:23
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】已知函数
,
,
.
(1)求函数
的极值;
(2)当
时,证明:
在
上恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585e4a758a1d8109e5a703db1d709ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d49ec515fb1fdc93ca4dda443326ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f30fb6211691e6806622209c68009e.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1c70461df5dccdfe3b7cc4941d0674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75f75243b9e93f8c0e25363681cb3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d49ec515fb1fdc93ca4dda443326ad5.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐2】已知函数
.
(1)求
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(2)若函数
有且只有一个零点,试求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1550cdcd8af4e25a3991cbdc499d0f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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【推荐1】设函数
,
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(1)讨论函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df71f8b32945f3915dd2a0b72593bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc148a3f230137cbecb9fae1d8e574f.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d100c22435a23e017cfe6f535379d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c72afb6c691b9f1436f2fcde35f5758.png)
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【推荐2】已知函数
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(1)讨论函数
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80e86d369cb8d2b5506d71113c2f177.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/875afd22d89b4e0b1bfc8ffaeaec9981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次