已知函数
,
.
(1)若
在
上恒成立,求实数
的取值范围;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7ed99a74e126a05cb520f19c094020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58170ac1369bc0c748d2d9ec5936299.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e312eca38032174f9739126b81d012.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a93cd92fea6bf680fc3e3d772ba63e.png)
2022高三·全国·专题练习 查看更多[3]
更新时间:2022-03-20 12:21:18
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解答题-问答题
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较难
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【推荐1】已知自变量为
的函数
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,
,
为自然对数的底数.
(1)若
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有且仅有2个零点;
(2)若
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,
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为任意正实数,证明:
.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75beac05ff31987303d0994a3a088162.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.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/291c25fc6a69d6d0ccfb8d839b9b4462.png)
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解答题-证明题
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名校
【推荐2】已知函数
.
(1)讨论
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(2)若
在定义域上有两个极值点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dac092855edaaa680cd1a8954ce69a6.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be07753eab86fa9c439a65db51c9a9e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24dcbef7c3ba13ba91cca5b6268ebf8.png)
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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)若
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的取值范围;
(2)若函数
的单调递增区间为
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的极大值为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afcf087b0c736bd212c6df303f02b30.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad7ceb234394ce32f3f49fac0b8af1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ab08e4aba1514c6df74e0fd090560d.png)
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【推荐2】设
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.
(1)当
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(3)若
有
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![](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)
您最近一年使用:0次
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解题方法
【推荐3】已知函数
,
.
(1)若函数
的图象与直线
相切,求实数
的值;
(2)设函数
在区间
内有两个极值点
.
(ⅰ)求实数
的取值范围;
(ⅱ)若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af636b59b07acdea3f32c324cd9f0068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb2dead8f5aa98f35cd681ea18e5eea6.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7863b54185da5a3f1a765e1aa0577e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e88ebfb5c0d6cce558b515be06404d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
(ⅰ)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048e3fa4318163c9980ad5b25985fead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】已知函数
.
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(1)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58119f48aa8860923d1f13dd78a17c62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ad584c674b9bf9617317f4470987c5.png)
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解答题-问答题
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【推荐2】已知函数
.
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有两个零点
,
,且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7634e1718156cb21dee6c64b54e9ea17.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解答题-证明题
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较难
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解题方法
【推荐1】设函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78169a2d299c36a4f5840c188a875fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5bcfb3bafe8373dd907e0e55d08f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcee353b85b4d18fc9131291e17275d7.png)
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【推荐2】已知函数
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(1)若函数
是定义域上的严格减函数,求
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(2)若函数
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(1)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c68ab4181ffc22679c971eed6d8286.png)
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(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
您最近一年使用:0次
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较难
(0.4)
【推荐3】已知函数
.
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的单调性;
(2)当
时,记
在区间
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的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf2a1ef53a0a08946e339fd1ff0daf6.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
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