已知函数
,其中
,
.
(1)当
时,讨论函数
的单调性;
(2)当
,且
时,
(i)若
有两个极值点
,
,求证:
;
(ii)若对任意的
,都有
成立,求正实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c34e863ef0d33a8f6731e8de30d845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6c73bd513d4450aab93d4b51f0b965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce4430b8b9b0c78de693513a7f88915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a915c1a8a9304aeb307d130faaeb15.png)
(i)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd888afdcfdb3e91a157d50f65e915e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f4ccfe8318ddad36a10feb9c9ccb09.png)
(ii)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d9703ec5eee8074ba7fbe0e899b336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6cd78a1f5bc60097c938bc4c2b3dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
19-20高二下·江苏南通·期中 查看更多[2]
更新时间:2020-07-12 12:58:12
|
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解答题-问答题
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解题方法
【推荐1】已知函数
.
(1)若
,求
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(2)若
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.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af400c833cd6e99bd1fef65d961bfaea.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3438e772828d56d7816af19c938e6c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d3d4b0ec5b7b2c5761a21bb5d31630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d43cf0e3cd2613316cb42a7b0672014.png)
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(0.4)
名校
解题方法
【推荐2】已知函数
.
(1)当
时,求
的单调区间与极值,
(2)若
,证明:当
,且
时,
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f43e99657ece85b991ae4889bfa8f9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec5792dbdc5ee1677ecd53435552272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ca796621ca1dc2a5e420bf41583c8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2210f152080d9a68a97c805f5c1cde96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5eb5616a3f2ffb2ed776848a080f30.png)
您最近一年使用:0次
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较难
(0.4)
解题方法
【推荐1】已知函数
,
.
(1)证明:
有且仅有一个极小值点
,且
;
(2)若对任意
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42cd5920c27db7257886fece226833b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4031b540afcd3061f431b735a3c62bb6.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b91a0a580b2483bcd16f916611f81c3.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0656eee2d8ee838aacfda24a00ad69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
解题方法
【推荐2】已知函数
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在
处的切线方程;
(2)设
,
,
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbbf0c30337e8822e2b63738c4a84d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6fb942324318994bba8c738cc5dc25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e52e48a333f16a96d0f988e78ffed18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea0a2a1ebc67f3f8cf87d6ddc4285168.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】设
,
.
(1)当
时,求
的极值;
(2)讨论函数
的单调性;
(3)若
有
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aec6e1f4e53301ed32b7a372456d0aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e37c35e33ffa1a55a0693ae2319da91.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9af6b8933cb0bcc983a15c903b5892e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a69d687de3fe9a82fe82eaf1dc00f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d96955796f392b93bfe98e749a0578d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(0.4)
【推荐2】函数
,
为
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(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ef26ac870ad22064613d1ee52f152a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(3)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86eff5761f61a20c240a428f2a7ceda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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较难
(0.4)
【推荐3】已知函数
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;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32366d4c63050a399be640fe6128bd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9597d83676a74b97062bdb77764f039.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b500317dc463b85d39a1e5b8cdde8935.png)
您最近一年使用:0次