已知正数
满足
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b9d4887c8c13311a2b9df1bf8fff07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
A.有最大值![]() | B.有最小值![]() |
C.有最大值2 | D.有最小值2 |
19-20高二上·安徽六安·阶段练习 查看更多[2]
更新时间:2019-10-30 08:57:54
|
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单选题
|
适中
(0.65)
【推荐1】已知不等式
对满足
的所有正实数
都成立,则正实数
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a40abcec831bb39fcbaa2b4eeafffc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ba90963f450c60595b022da7a1df523.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.1 | C.![]() | D.2 |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知圆
与圆
相外切,
,
为正实数,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd019fafe2ba1cb19e638ebf8d911ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51bd61270cc06f89176570cadc7d900.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/f4741556c029b5811318746d837cf246.png)
A.2 | B.![]() | C.4 | D.![]() |
您最近一年使用:0次