下列不等式证明过程正确的是( )
A.若![]() ![]() |
B.若x>0,y>0,则![]() |
C.若x<0,则![]() ![]() |
D.若x<0,则![]() |
2023高三·全国·专题练习 查看更多[2]
更新时间:2023-05-28 15:17:19
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【知识点】 基本不等式的内容及辨析
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单选题
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适中
(0.65)
名校
解题方法
【推荐1】若
,下列等式不可能成立有( )个.
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e201cfccd2691e8497802df6fdbb8d01.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b38b4aa2a1bf5ba1cf46a4f0ec9312.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b1c95f292d04294948e1c09f1ffa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e201cfccd2691e8497802df6fdbb8d01.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b38b4aa2a1bf5ba1cf46a4f0ec9312.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b1c95f292d04294948e1c09f1ffa95.png)
A.0 | B.1 | C.2 | D.3 |
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单选题
|
适中
(0.65)
解题方法
【推荐2】已知正实数
满足
,使得
取最小值时,实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6072898569805cc553a98d202fcc0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7266b2ef457b8ddeee3fa2cc24022e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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