已知函数
,
为自然对数的底数,
.
(1)试讨论函数
的单调性;
(2)当
时,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d827f87e10a7848797480161dcf3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)试讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a8fd8949e90d0e3a82b49ffcf621327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-01-13 03:46:38
|
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【推荐1】已知函数
,
,
.
当
时,求函数
的单调区间,并求出其极值;
若函数
存在两个零点,求k的取值范围.
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较难
(0.4)
解题方法
【推荐2】已知函数
.
(1)当
时,求函数
的单调区间;
(2)设
,若
为函数
的极值点,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fc91b2ddd0231d5631a0ac5a38f66d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeb0fdce0caf37042e443cee848786d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec0a65545cd9a9b316acc9774231778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd81190587da2d212a668c8088541c33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知函数
(
且
是自然对数的底数).
(1)讨论函数
的单调性;
(2)当
时,
恒成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd7519a57f370a693d7884ca993a10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5cb8eeb53ced642dddffbb0b52ece2a.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6cbc100d86be097ec3c76cec2c6a59.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e47f662db47da0c07a77997930f006.png)
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解题方法
【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87477761ec5fad26e724fdbd1d1af427.png)
(1)试讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186c8923781cf3a5879a939c4c110d69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb49dbba01c4ff5f686ffc8828351b2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
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解答题-问答题
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较难
(0.4)
【推荐3】已知函数
.
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(2)讨论函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a115f3c84ffeb576f76915c5cbf1211f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
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(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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