已知函数
.
(1)解不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353c51e38c33301e335ab3a5344d9e1c.png)
(2)记不等式解集
中元素数值最小值为
,若正实数
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a469a8db0a0a4acef31c074d61cb17b8.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353c51e38c33301e335ab3a5344d9e1c.png)
(2)记不等式解集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353c51e38c33301e335ab3a5344d9e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9a8ddeb83566685cf31c319bd0484b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6dfad6c2e8d19daeb93beb5e336163e.png)
20-21高三下·全国·阶段练习 查看更多[3]
(已下线)“超级全能生”2021届高三全国卷地区4月联考试题(丙卷)理科数学试题(已下线)“超级全能生”2021届高三全国卷地区4月联考试题(丙卷)文科数学试题(已下线)不等式选讲【专项训练】-2020-2021学年高二数学(文)下学期期末专项复习(人教A版选修4-5)
更新时间:2021-05-30 21:16:22
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解答题-问答题
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适中
(0.65)
真题
【推荐1】已知函数
=
.
(Ⅰ)当
时,求不等式
≥3的解集;
(Ⅱ) 若
≤
的解集包含
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b3089086afa6759e1ef8f26e40af5a3.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8e1dd8da540badcb9a8f427c5b202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33931651893cffc7112c99e608333059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9210e75c35fb455d0446eb7ddba7d79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知函数
,当
时,
.
(1)求
的取值范围;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a646ded3861df41de70ad46a86858aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d6e81ff62a52037bc6d9bde7cd5cc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b25a72152ef4c73cc823392338c5884.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知函数
.
(1)当
,求不等式
的解集;
(2)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0ec2569781516fdf9a63408dd835cd.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df84fc96214a62a6a168344315d5e71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8855b45de49990552c8d22b974552df1.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】已知函数
.
(1)求不等式
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770379803165ea8961850c963ef5c0d8.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7229b58a2313baa126a3d87b62114e09.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdab0bd0603043347f5a5fc19e19f2ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f17b382e59a5e5e5d0bd6db76916b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed65d2b2273bec4d329b2e06858438b.png)
您最近一年使用:0次