名校
1 . 已知函数
.
(Ⅰ)证明:当
变化,函数
的图象恒经过定点;
(Ⅱ)当
时,设
,且
,求
(用
表示);
(Ⅲ)在(Ⅱ)的条件下,是否存在正整数
,使得不等式
在区间
上有解,若存在,求出
的最大值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00981f1c2aa457e61fcc47ea4d189764.png)
(Ⅰ)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825793ebd4bb376a09621f163ac990a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9998f27aca8e31ba479b96858b509c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67e05883ca3ade551877c6e9494b809f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892c0749e795ee8069da2f543d26475e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(Ⅲ)在(Ⅱ)的条件下,是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890f3e6166ce49230950c5acabfc96ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530e48690edc3429da2d23c25151296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-10-14更新
|
1183次组卷
|
6卷引用:湖南省怀化市2017-2018学年高一上学期期末考试数学试题
名校
解题方法
2 . 已知函数f(x)=loga(x+2)-1(a>0,且a≠1),g(x)=x-1.
(1)若函数y=f(x)的图象恒过定点A,求点A的坐标;
(2)若函数F(x)=f(x)-g(x)的图象过点,试证明函数F(x)在x∈(1,2)上有唯一零点.
您最近一年使用:0次
2017-11-25更新
|
1063次组卷
|
2卷引用:2017-2018学年人教版A版高中数学必修一 第3章 章末综合测评3
解题方法
3 . 已知函数
(
且
),
.
(1)函数
的图象恒过定点
,求
点坐标;
(2)若函数
的图象过点
,证明:方程
在
上有唯一解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81a4ff90abd8dff9761c25cec7ef406.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/8ec1f76cada8418e05c14ad363604337.png)
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4633de9335d15d7685bdecb007a3678c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316fcdd27cabf26bc1f9ab33cfdcbdff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf22c3355e905e9df956d8279a8d7c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12990c8fb311e13845e5b433dcbcd417.png)
您最近一年使用:0次
解题方法
4 . 已知函数
(
,且
),
.
(1)函数
的图象恒过定点A,求A点坐标;
(2)若函数
的图像过点
,证明:方程
在
上有唯一解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/791d213374e7656c14629d4466d5df6a.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/84150c16bbe9fca396a93976d2a9642d.png)
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3c2be7482719651bcf491949681e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7362fa526a84b0ce2f5a2021dbc44399.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8320d3365a905669e28c77c9cd46f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
您最近一年使用:0次
2016-12-03更新
|
966次组卷
|
2卷引用:2015-2016学年广东省深圳市高中高一上学期期中数学试卷