已知
,
,
均为正实数,且
,证明:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a5b6a23f530bddc0b3b4ea826df429.png)
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a5b6a23f530bddc0b3b4ea826df429.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f92e7348770112323d2a35810833f64.png)
2020·河北张家口·二模 查看更多[5]
2020届河北省张家口市高三下学期第二次模拟数学(理)试题2020届河北省张家口市高三下学期第二次模拟数学(文)试题(已下线)必刷卷04-2021年高考数学(文)考前信息必刷卷(新课标卷)(已下线)2022年全国高考乙卷数学(文)试题变式题13-16题(已下线)2022年全国高考乙卷数学(文)试题变式题21-23题
更新时间:2020-06-22 23:04:19
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解答题-问答题
|
适中
(0.65)
【推荐1】选修4
5:不等式选讲
已知函数
.
(Ⅰ)解不等式:
;
(Ⅱ)若
使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a05df8edae997c5ab235e54755ed33.png)
(Ⅰ)解不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18176c64429353a8f849298d58d5fd8f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52330215ba284f9a787c700074588255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abea001a7a70507db19bc412b5cf3940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】选修4-5:不等式选讲
已知函数
.
(1)若不等式
恒成立,求实数
的取值范围;
(2)若对于实数
,有
,
求证:
.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539e46e36cebd9029f85d6f3a668bbb.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52976cb822deeb61bc039d2171e7aca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若对于实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613cf2079366e8ffd93be79dcd036f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4507465690d3d09817b72f25860dbf37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735ae46f23c3b3e301700764fd144617.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】经计算可发现:
,
,
,试写出一个使
成立的正实数
、
满足的条件,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b26c8d013be6d59af686bf992e0b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d866285fa0abc6754bc8cb4a0f173b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9180bb4f6d6545c463dfeffea81f2568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057a681214466d857847c31b63285c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
解题方法
【推荐2】已知函数
.
(1)解不等式
;
(2)若正实数
,
满足
,且函数
的最小值为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665c5d3498d29d1a1f8c2685e7e0efaf.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02bdb9352c3d83757dcf46cc84cd1d47.png)
(2)若正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132bc768c61ab195768601a0be02222a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d212c132ea68524c87ec5752aa9a333a.png)
您最近一年使用:0次