已知函数
.
(Ⅰ)若
,令函数
,求函数
在
上的极大值、极小值;
(Ⅱ)若函数
在
上恒为单调递增函数,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f123437102a4c01d8aec6a15d09b8c.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be7892193e97bf330eec0782dfb18fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795ee91678ad50ac0bf3ae6dea537d44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0052c5c876a5351b1fb3a69dba1e6cf.png)
(Ⅱ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/346f4e371a0268d852f4a770aab6eb22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
2011·山东青岛·一模 查看更多[4]
(已下线)2011届山东省青岛市高三第一次模拟考试数学文卷(已下线)2011---2012学年山西省临汾一中高二下学期期中考试文科数学试卷(已下线)2011-2012学年云南省会泽县茚旺高级中学高三上期中文科数学试卷云南省玉溪市民族中学2016-2017学年高二下学期第二次阶段考试数学(文)试题
更新时间:2017-07-16 20:51:49
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解答题-问答题
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较难
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解题方法
【推荐1】已知
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为自然对数的底,
.
(1)当
时,证明:函数
在
上单调递增;
(2)若对任意正实数
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均有三个零点
,其中
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790eeedb6ce1d481553f876f2b9b29ff.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051b07f6c5ab13a5df7607ef22850b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
(2)若对任意正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8f1285c681b78d07c384040e92ef52.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322ce3b60299575b162e7edb95977e11.png)
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(2)当
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解题方法
【推荐1】已知函数
(
为非零常数),记
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.
(1)当
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恒成立,求实数
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(2)当
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且所有点
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(3)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4187aadeb68df93870c9e416ad7244c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7708ba23f01d33c69df8ea236c876f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b8ae9ec829851d83bfb73429ee8009.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
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(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe24ccc3dd4dbadd2f757cf7b7a44a6e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9acaba1f9b687c7cdd4cf9924f19047f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d413c25f6271c3b97a668dc47b8d7de.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104b081cfbc9120b476831c79a749c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bffc9c4bf9de4d804885955aff039ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/548636534994cd465dfc7bf7dd41505b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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较难
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名校
【推荐2】已知函数
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