名校
1 . 对于定义域为
的函数
,如果存在区间
,同时满足:①函数在区间内是单调函数;②当定义域为
时,
的值域也是
,则称
是该函数的和谐区间.
(1)求证:函数
不存在和谐区间;
(2)已知:函数
有和谐区间
,当
变化时,求出
的最大值;
(3)易知,函数
是以任一区间为它的“和谐区间”,试再举一例有和谐区间的函数,并写出它的个和谐区间(不需要证明,但是不能用本题已经讨论过的
以及形如
的函数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e1c4e16e2ff56b5eb232e64fb16f63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db527571cfd256c515424c6f9d114284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db527571cfd256c515424c6f9d114284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db527571cfd256c515424c6f9d114284.png)
(1)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d86f0ed74dbc08b364e8e9d972be06.png)
(2)已知:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e476b61058e4bad76051c3539f5f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db527571cfd256c515424c6f9d114284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64da75a02173c2a5eb40f4c68d0f4f36.png)
(3)易知,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f06791e930c500232578cf72369475.png)
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解题方法
2 . 如果存在非零常数
,对于函数
定义域上的任意
,都有
成立,那么称函数为“
函数”.
(Ⅰ)若
,
,试判断函数
和
是否是“
函数”?若是,请证明:若不是,主说明理由:
(Ⅱ)求证:若
是单调函数,则它是“
函数”;
(Ⅲ)若函数
是“
函数”,求实数
满足的条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b29a7faa14a6e09d0db2d04f4ced03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae5a1f884023d902fca242b3490a922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b43b9ac168348257cf8436046eb107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f19e893159870d911d83af4f4b2b70ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74314814cdc6fb803abb4692458af131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
(Ⅱ)求证:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6dd0e5f0398c7a86d8fee82d0cc170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
(Ⅲ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498d16aa0037412cb18fa2411610ca2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 已知函数
.
(1)求证:
在
上是单调递增函数(用定义证明);
(2)若
在
上的值域是
,求
的值.
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572424759541760/1572424765308928/STEM/4d5b41d3979642c194444f8dc3edca62.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572424759541760/1572424765308928/STEM/5a983584c8bb498c8ccb6d47e01cb6f7.png)
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572424759541760/1572424765308928/STEM/38d5509ed8ac42ad95b13816cac82879.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572424759541760/1572424765308928/STEM/5a983584c8bb498c8ccb6d47e01cb6f7.png)
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572424759541760/1572424765308928/STEM/11469d37d97c4d579ce41b0bbc108d90.png)
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572424759541760/1572424765308928/STEM/11469d37d97c4d579ce41b0bbc108d90.png)
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572424759541760/1572424765308928/STEM/a5471f65258047afb7a1dbfeacb76dc0.png)
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4 . 已知函数
的定义域为
,若
在
上为增函数,则称
为“一阶比增函数”.
(1)若
是“一阶比增函数”,求实数
的取值范围;
(2)若
是“一阶比增函数”,求证:
,
,
;
(3)若
是“一阶比增函数”,且
有零点,求证:
有解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e82cc461b9607e08a8b31597f6d26df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbd41b395876a630b360b2a34acbcd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673207f6b77b8192d25463d071737b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1a5699410baa270f3fa8153ab346e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbe66bbf8d1c5647038819e31d88015.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b244b324e93c98de88fbffa52fc103f1.png)
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名校
5 . 已知函数
.
(1)当
时,用定义法证明函数
在
上是减函数;
(2)已知二次函数
满足
,
,若不等式
有解,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bfa97d2f3034a174452e05e809c1d5.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(2)已知二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e724c1f6e4c27b8503e158f0548e565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d155faf1d2e546c55c670afabcc7237b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75f75243b9e93f8c0e25363681cb3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
6 . 若函数
在定义域的某区间
上单调递增,而
在区间
上单调递减,则称函数
在区间
上是“弱增函数”.
(1)判断
和
在
上是否为“弱增函数”(写出结论即可,无需证明);
(2)若
在
上是“弱增函数”,求实数
的取值范围;
(3)已知
(
是常数且
),若存在区间
使得函数
在区间
上是“弱增函数”,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acaa791feb147bd1a8bf5eb4f81a0cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ea7e5fa2b009388cc66bd8d816b615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00cb73f31f15e5f2118b7daaa664d091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d3266467bb75ca05ef2070c07b37fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ce0c881a49650bf16c7e85c22df672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c38ac53aa0fb5af2de379cd58ea5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2023-11-11更新
|
144次组卷
|
2卷引用:湖南省湖湘教育三新探索协作体2023-2024学年高一上学期11月期中联考数学试题
7 . 函数
的图象经过点
,
.
(1)求函数
;
(2)设
,
,问:是否存在实数p(
),使
在区间
上是减函数,且在区间
上是增函数?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af8981b3b896bc0c9ae0cb699f94c1d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2599bfa462c966a4988436b8c8bb7b30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e48e58aca82f136d6f0cc5251fd2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff43a92f35dd115e3f8a3f2dd973b7a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7be8524456ba4e9abb973da323c0c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27df58608819f3260cededaf16eb9770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d156bb96e4a831d3f7c6e338a7cbfd0.png)
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解题方法
8 . 已知函数
.
(1)若
为单调函数,求
的取值范围;
(2)设函数
,记
的最大值为
.
(i)当
时,求
的最小值;
(ii)证明:对
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec7ad5b02c011e65f7fc9252d3f0e0b6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b56f1b73c0341b4c4093ed25f689fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d6bb01f1044358cc5fee441bc62489.png)
(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391b26ce591ed90a0d3450ebd4c9fb79.png)
(ii)证明:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd3ca3a11d8884e340f018483a1491c.png)
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9 . (1)根据函数单调性的定义证明函数
在区间
上单调递增.
(2)已知函数
在区间
上单调递增,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793471a6755dae1aa529e3942de50b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9e66b73038b6279d204a47a78902ad.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f83756e1e8819ec9eb554270e888be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9e66b73038b6279d204a47a78902ad.png)
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10 . 已知函数
,
.
(1)若
,证明:
在
上单调递增;
(2)若
在
上是单调的,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37433974f629e5d761af8e278605630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2023-11-14更新
|
139次组卷
|
2卷引用:广东省顺德区德胜学校2023-2024学年高一上学期期中数学试题