名校
1 . 已知
,
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04959523a28786962d51cfb43a8767d7.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-11-30更新
|
1565次组卷
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8卷引用:海南省海口市海口中学2021-2022学年高二下学期期末考试数学试题(B卷)
2 . 已知
都是正数,求证:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbefc06b3b4e54a6a1690e870efc69b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2298ce02fb0d122e2b23438a63c4c820.png)
您最近一年使用:0次
解题方法
3 . 已知存在
,使得
,
.
(1)求
的取值范围;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead0fd16b61be43dce5f4f387ef38b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3c270c7508ec18bfae26af47763aab7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55d57f06fe39039e0be9d27ce28b1b35.png)
您最近一年使用:0次
2020-03-18更新
|
264次组卷
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2卷引用:2019届天一大联考海南省高中毕业生班阶段性测试(三)文科数学试题