已知函数
,
.
(1)当
时,求函数
的极值;
(2)若实数
,
,
满足
,且
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9d9c763faf47080a97435dab357a18c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60a2473d26ec643820dcd6d80a49bb3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b0a64e4a48409a6e33a97886905dc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
(2)若实数
![](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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d94e8a4b54b22a07e8d9413902c40e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de855c40083452bcd52e553ee39fdf4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ec84f0bcc8633b6eeed64008d062a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
2022·全国·模拟预测 查看更多[1]
(已下线)2022年高考最后一卷(押题卷七)数学试题
更新时间:2022-05-17 14:42:53
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解答题-问答题
|
较难
(0.4)
名校
【推荐1】已知函数
,
.
(1)若函数
只有一个零点,求实数
的取值所构成的集合;
(2)已知
,若
,函数
的最小值为
,求
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de31991e435bd7f80b8ac4f50b3f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc774a9ac8258cfc1b6f7f5378fb7406.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804125ef5ede01523a3f7d95a35f964b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51dedd7e4a202a2e078dfa7c6017c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b2ed621d7f11decf6432e43c3cc5ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c21c961479a9ac78f7c40cc7564fbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c21c961479a9ac78f7c40cc7564fbb2.png)
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解题方法
【推荐2】已知函数
,其中
为非零实数.
(1)求
的极值;
(2)当
时,在函数
的图象上任取两个不同的点
、
.若当
时,总有不等式
成立,求正实数
的取值范围:
(3)当
时,设
、
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6223c3678ff0901122781bcd0bcdeed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbd5bb726a08c308b48373afebbb768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099f357e54f2f7ce159e7c942e6f2c07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8198c3b302b3820e86763428eb1e91cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3463ced6030af957f13f9ba05b977c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7838e6e705ec359ca0a27ecb131cce22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a850874036273f74ce65d00038e435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2519954ec2deabecd7e057886fa4023c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6161be3c8fe74ed264bb8cd6d708aecc.png)
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解题方法
【推荐1】已知函数
.
(1)讨论函数
零点的个数;
(2)是否存在正实数k,使得
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d42bc1614c3372edf362b4c07154fba.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcac5b738cd5ea12f6d93e9c5fc6bcd5.png)
(2)是否存在正实数k,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8800c695cb799480fe1eb3859868e5.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2】已知函数
.
(1)求函数
的极值;
(2)求证:若
对
恒成立,则
;
(3)设
,对任意的
,都有
成立,求实数
的取值范围..
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f27edc2505e48f2d98f8317bb2e746d.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求证:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/babc2bdb59e9ae1821bd48e7395474d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9991ad3dd998b57ba038c1ff4dc1e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61aff59aec17eda8d59e7d39f8a4c356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐3】设实数
,已知函数
.
(1)当
时,求函数
在
处的切线方程;
(2)若
在
上恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e64b43956c68f0fcbafcebe6e4b31e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c164755dc2d7cff80fb4c9cffc9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次