已知函数
.
(1)求函数
的单调区间;
(2)函数
,证明:当
时,
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b95ee9496e29d0ebcc26c67e20d2390.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7902ae9dffed577caac94bbab68ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c84b49231d0344d0813a7bbd2acdaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17af43cc460a6a7010d51a0c9403d67.png)
20-21高二下·湖南·期中 查看更多[4]
湖南省三湘名校教育联盟2020-2021学年高二下学期期中数学试题(已下线)第13讲 双变量不等式:主元法-突破2022年新高考数学导数压轴解答题精选精练(已下线)第14讲 端点恒成立与端点不成立问题-2022年新高考数学二轮专题突破精练(已下线)第7讲 主元法巧解双变量问题-2022年新高考数学二轮专题突破精练
更新时间:2021-07-10 15:31:59
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解答题-证明题
|
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解题方法
【推荐1】已知
,函数
.
(1)讨论
的单调性;
(2)若对
,不等式
恒成立,求
的取值范围;
(3)已知当
时,函数
有两个零点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8498ec3f95dc5dde9a603c3750a27a.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec36cf3faab095cd6e9e22a4c9f840b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b481524d4ba0573492fd3be9beee0c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)已知当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757e183e8ecf5368d59fe6e6d41ab92d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dae74c724114bfeff024dd7b79f5edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7738e78edfe59f7a273b545f5c5aba.png)
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名校
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a9f8395260e25cfc43276f3d89da9.png)
(1)当
时,如果函数
仅有一个零点,求实数
的取值范围;
(2)当
时,试比较
与1的大小;
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a9f8395260e25cfc43276f3d89da9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4232fb8753635ae49af3a1c26803894f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce93cdf2d3ad0ae99c605dc3f2f275f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cef2adddb2ee157eadf97b0df8c6867.png)
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(0.4)
名校
【推荐1】设函数
,
.
(1)设
,讨论函数
的单调性.
(2)设
,求证:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee0dae81fcfa3a4102e12b7a95ccb28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55f52372a24ec49abc8a432c5efde074.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eacd7ca85c59ad4d006541a62f8e8f24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063fc2a5b1667d0d0a788e5746af711e.png)
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名校
【推荐2】已知函数
.
(1)讨论
的单调性;
(2)当
,
,求a的取值范围;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316198f89b8fb02ea1a8ede6eeedadb1.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf50f11da639dcb754e254d5fde0d1d.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44930f204cd34d08959e34f32b98c1bb.png)
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【推荐3】已知函数
.
(1)求
的单调区间;
(2)若
有两个零点
,
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3391938df881c29070a558f437019c6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)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/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d567310829d138ef757bf2e94e525bcb.png)
您最近一年使用:0次