已知函数
.
(1)若关于
的不等式
恒成立,求
的取值范围;
(2)若
,
是
的两个极值点,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac860233fe47f896c65baee8618f65e7.png)
(1)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bddbeb72add81efd8c7f548a16b02b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](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/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370a1cb12f919052d2a66a552d6308ca.png)
21-22高二下·湖南衡阳·期末 查看更多[3]
更新时间:2022-07-10 00:24:24
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解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】已知
是函数
的一个极值点.
(1)求
值;
(2)判断
的单调性;
(3)是否存在实数
,使得关于
的不等式
的解集为
?直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72f214ed68e41f493db27cb7416f28a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db64b3a1fb036b1e15ecc1420f008013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-问答题
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【推荐2】已知函数
.
(1)讨论函数
的单调性;
(2)假设函数
有两个极值点.
①求实数
的取值范围;
②若函数
的极大值小于整数
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3b7c78cfba4fa7e853cf90211461b7.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)假设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f71f0e7ef25e3b1d2d9a73c533b0fdf.png)
①求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-证明题
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【推荐1】已知
.
(1)求函数
的单调区间:
(2)设
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,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f997d106b584b15aaac835a749c5c6bf.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc807f76d58df49f083de0c4a21eff3.png)
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较难
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名校
【推荐2】已知函数
,
.
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存在两个不等的实根
,
,求a的取值范围;
(2)满足(1)问的条件下,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b6241f7b2ff6aba96842acfa3fe752.png)
(1)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0008d46dc238d710a1efe7e2c17237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(2)满足(1)问的条件下,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7effc8ca1aa370671b9e20be372a8d6.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
【推荐1】已知函数
(
).
(1)求函数
的单调区间;
(2)是否存在
,使得不等式
恒成立?若存在,求出a的取值集合;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c07feb9c0ab8f0c6285a807ec77998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8790a007ac85f61d59be945fb3e5b910.png)
您最近一年使用:0次
解答题-证明题
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【推荐2】已知函数
的两个极值点分别为2,3.
(1)求
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的值,并求出函数
的极值;
(2)已知
,求证:不等式
在
上恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4257891e41280fe14712668856d0489.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047fa89ef19fb525f45f85e0c7509403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aaada27ba11bcd779d26a63b1f91bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
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【推荐3】已知常数
,函数
,
.
(1)讨论
在
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(2)若
在
上存在两个极值点
,
,且
,求常数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4695fac30bed79e4e7c81b2e362f00e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8a9801bb1eff454386bf5c64945ea9.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e64ba8593537d13752713ecc882cd5c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a97f1b82d2a229a60d0297c6e116dcab.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/67eda7d7ed58d13b061fc209ad4ed1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次