若
,
,则的
最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776ffa61c65055b2a3fa2a327e74a0e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12cce3d982c97d75768ad31b5348b0d6.png)
A.2 | B.4 | C.3 | D.8 |
更新时间:2023-12-01 10:03:32
|
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单选题
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(0.94)
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解题方法
【推荐1】若正数
,
满足
,则
的最小值为 ( )
![](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/d8ff48e1859c1d189fd4dba4611235db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
A.![]() | B.![]() | C.![]() | D.2 |
您最近一年使用:0次
单选题
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容易
(0.94)
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【推荐2】已知
,
,
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a8f4f4b9a63a58c3a4b53bd5b770d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d66a894fe1c8dddb41d9e4885e979a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f492143dbad603d1dc9a45ec39e2f801.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】设自变量x对应的因变量为y,在满足对任意的x,不等式y≤M都成立的所有常数M中,将M的最小值叫做y的上确界.若a,b为正实数,且a+b=1,则-
-
的上确界为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e28f005da664fc2f7ceacf1e32261e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea39f84182bd72f823bfc476d0dd0f9f.png)
A.-![]() | B.![]() | C.![]() | D.-4 |
您最近一年使用:0次
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【推荐2】若
,
,且
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的最小值为( )
![](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/132bc768c61ab195768601a0be02222a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0113fd4c7d157757571f9a009e02af.png)
A.![]() | B.![]() | C.6 | D.![]() |
您最近一年使用:0次