设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c57a34b8365811972ea3dc2f01d5f3.png)
(1)若存在
,使得
,求实数m的取值范围;
(2)若m是(1)中的最大值,且正数a,b满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c57a34b8365811972ea3dc2f01d5f3.png)
(1)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce5118394e703092a3ac1deb901eeeb.png)
(2)若m是(1)中的最大值,且正数a,b满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab04de6651256f6281e9f4c1dc3c7955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deba97f507ced9a7884d4d5c855f4e3a.png)
更新时间:2020-02-15 23:31:42
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解答题-证明题
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较易
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【推荐1】选修4—5:不等式选讲
已知函数
.
(1)求函数
的最小值
;
(2)若正实数
满足
,求证:
.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a3eaaad0498f3ffe028b103b647da2.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12cbb1445fa15d35998c6345ea5f31dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82e0326fbbdacb67f2ed8cbbd0e5ef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85601c6611cf784b55b2fdb9011ac4d4.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】设函数
.
(Ⅰ)若存在
,使得
,求实数
的取值范围;
(Ⅱ)若
是(Ⅰ)中的最大值,且正数
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8047bc19d6c7b8cc855337c06873a7b5.png)
(Ⅰ)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e469d28cdf8d8a1a6495ceeeb83de0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](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/ab04de6651256f6281e9f4c1dc3c7955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deba97f507ced9a7884d4d5c855f4e3a.png)
您最近一年使用:0次
解答题-证明题
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较易
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解题方法
【推荐1】已知函数
.
(1)求不等式
的解集;
(2)若
,求证:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/130ec229196088901cb525ecef856e82.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f61db73a5a9bce4ece8259a4c7d29376.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce6053a7fbf2343bd64c0591624b1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df67c0d86b04f8f74081f14c2507a219.png)
您最近一年使用:0次
解答题-问答题
|
较易
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【推荐2】.已知
,
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是正实数,且
.
(1)证明:
;
(2)求
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![](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/483e8298320b2fe64e3b2dbe845ad115.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2530b9f190cc51d3430ec91bdc1052.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b76f36ae34a673185c08fee2377d4b.png)
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