解题方法
1 . 命题
已知幂函数
在
上单调递增,且函数
在
上单调递增时,实数a的范围为集合A﹔命题
关于x的不等式
的解集为B.
(1)若命题P为真命题,求集合A;
(2)在(1)的条件下,若
是
的充分不必要条件.求实数t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569675dd7b2aca2732324f4bea5c02e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4fe5a5423ce135a39396860eff57b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a694398612eb642d58da09529a41fdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b6bec0e5c57dc0c97d2581012d2c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a42b1d739ba1b2eea55106935f70e3.png)
(1)若命题P为真命题,求集合A;
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
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2022-11-25更新
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171次组卷
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2卷引用:山东省济宁市微山县第二中学2022-2023学年高三上学期期中数学试题
名校
2 . 已知
,
(
且
),函数
.
(1)求函数
的单调区间;
(2)若函数
的图像在点
处的切线的斜率为1,问:
在什么范围取值时,对于任意的
,函数
在区间
上总存在极值?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba45b4ef489b25cdcabebf818897df3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b6851591b23f754a5704f6089d310b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26c2087e3a2711f42846403839c200e.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150e8e4ca6aa729a72a6a17c36b8ebfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af2f597ea3f4dcfb89acb19a4ea6355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d4f43bcb6c64f0c5e15c9f36f1a26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a2eafb3dd274dd9b98d83c38e87802.png)
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3 . 已知实数a为常数,且
,
,函数
.甲同学:
的解集为
;乙同学:
的解集为
;丙同学:
的极值为负数.在这三个同学中,只有一个同学的论述是错误的,则a的范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd594e99f82b7736c44e18b2721e607f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abfa7f173dc46ec1c5f054547333563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6d8d3a028094e677b6a48855a93d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6d8d3a028094e677b6a48855a93d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
4 . 函数
,其中
且
,若函数是单调函数,则
的一个取值为______ ,若函数存在极值,则
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4027548930356b49de67017139697152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . (1)已知函数
,
,若函数
在
单调递减,求实数a的取值范围.
(2)已知
在R上不是单调函数,则b的取值范围.
(3)已知函数
在
上单调递增,则实数a的取值范围.
(4)已知
,若对任意两个不等的正实数
,
,都有
恒成立,则实数a的取值范围.
(5)以上几个题请你总结一下由单调性求参数范围的解题方法及每种方法的适用条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d53fab31408a594c6d6f238c32d8643b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c416915a846b4d23276a778082c992.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bc3f5164d96813af9e98915b5be67d.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0f0ef6bdd7c1ed8743b1cabfdb7b5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb49dbba01c4ff5f686ffc8828351b2.png)
(4)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d3939af2307f5c82d7144a51401da1.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/c5f9dd5bc0ca44525f621a3cb5267e79.png)
(5)以上几个题请你总结一下由单调性求参数范围的解题方法及每种方法的适用条件.
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6 . 已知函数
.
(1)若
,求不等式
的解集;
(2)已知
在
上单调递增,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0ba068906acd08973bf89c1c06e81c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc64c9fc732c76bec3e691d7ddbbefe.png)
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解题方法
7 . 已知函数
.
(1)求不等式
的解集;
(2)求函数
的单调区间和极值;
(3)函数
在区间
上的最大值和最小值;
(4)若在区间
上,函数
总有最小值,求出
的取值范围;
(5)在函数
的图像上是否一定存在两条互相垂直的切线?(本问直接写出结论,不需写理由)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16aaf28cf0a4c43bf5ffc79a68e1a36.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87c830a03204a5b783ad4c2ba49c4e.png)
(4)若在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a8f80511de15d3dfb871ca2f400424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(5)在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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8 . 若关于
的不等式
的解集包含区间
,则
的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ec886bee3b238925e496b554997c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a7a4a037a4dfe973f1eb683d93d799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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