名校
解题方法
1 . 已知
,若方程
有四个根
,
,
,
且
,则
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272f0b36fdd0aa4a35ea35b08f606de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577ae7344fd256ae4c8034a4c5fc83fd.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/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604274ad6707a906eba371a9e884144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2741ca619df1d9ab3d9ced4c49142dc.png)
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2022-01-17更新
|
3155次组卷
|
5卷引用:广西南宁市第三中学2021-2022学年高一下学期期中考试数学试题
2 . 已知直线
与曲线
和
分别相切于点
,
.有以下命题:(1)
(
为原点);(2)
;(3)当
时,
.则真命题的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ec45b0558fc0d3473ca9da21d5c073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bce8006396fd6519f366dc4a7cb8045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0954a8b329893eb0c5b400e3fbc4042f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b86d609bdb16f3fe441794c7140446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a4e0d114afe36b3ad5eaac27ddee8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0e4f76b0a117ca47e208a5aa991b6a.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2020-10-24更新
|
1958次组卷
|
5卷引用:广西桂林市第十八中学2021届高三上学期第二次月考数学(理)试题
名校
3 . 对数函数g(x)=1ogax(a>0,a≠1)和指数函数f(x)=ax(a>0,a≠1)互为反函数.已知函数f(x)=3x,其反函数为y=g(x).
(Ⅰ)若函数g(kx2+2x+1)的定义域为R,求实数k的取值范围;
(Ⅱ)若0<x1<x2且|g(x1)|=|g(x2)|,求4x1+x2的最小值;
(Ⅲ)定义在I上的函数F(x),如果满足:对任意x∈I,总存在常数M>0,都有-M≤F(x)≤M成立,则称函数F(x)是I上的有界函数,其中M为函数F(x)的上界.若函数h(x)=
,当m≠0时,探求函数h(x)在x∈[0,1]上是否存在上界M,若存在,求出M的取值范围,若不存在,请说明理由.
(Ⅰ)若函数g(kx2+2x+1)的定义域为R,求实数k的取值范围;
(Ⅱ)若0<x1<x2且|g(x1)|=|g(x2)|,求4x1+x2的最小值;
(Ⅲ)定义在I上的函数F(x),如果满足:对任意x∈I,总存在常数M>0,都有-M≤F(x)≤M成立,则称函数F(x)是I上的有界函数,其中M为函数F(x)的上界.若函数h(x)=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55752f2f593e8842422cb96014d12842.png)
您最近一年使用:0次
2019-04-23更新
|
1457次组卷
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5卷引用:广西南宁市第二中学2019-2020学年高一上学期期中数学试题
广西南宁市第二中学2019-2020学年高一上学期期中数学试题四川省成都七中2018-2019学年高一(上)期中数学试题江苏省扬州中学2019-2020学年高一上学期12月月考数学试题(已下线)2019-2020学年高一上学期期末复习1月第01期(考点05)-《新题速递·数学》广东省实验中学2019-2020学年高一上学期期末数学试题
4 . 定义在
上的函数
,
单调递增,
,若对任意
,存在
,使得
成立,则称
是
在
上的“追逐函数”.已知
,下列四个函数:
①
;②
;③
;④
.其中是
在
上的“追逐函数”的有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36794f83a45547529322243901725f70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7673cf2e23d15c4062356f89cb7f259e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208575de4f7422c995dd601c54d264d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3211fdab46b25330ea846208975744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36794f83a45547529322243901725f70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df9a16664ad088899f6437b9637b80b2.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d2564de2bbd4b9d541d677d9e39baa.png)
![](https://img.xkw.com/dksih/QBM/2017/2/10/1625065709297664/1625065709682688/STEM/d440cfc65e1142e79888bef8da8a36c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5933e9dcff69d4c39c768b610390bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405eaa0e21c6829438430175d133414e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f7464e7559a63bba3915987982fa9c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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