已知函数
.
(1)若对
,
恒成立,求实数n的取值范围;
(2)若
的最小值为4,且正数a,b,c满足a+2b+c=n,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30441875481576f8b92039fed2d78951.png)
(1)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/261e144f836261e4771501b7b26862f1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2820e6e888da175da63fb59e0990c8.png)
22-23高三上·河南安阳·阶段练习 查看更多[8]
更新时间:2022-10-27 21:18:32
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(1)求
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【推荐2】设函数
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(1)若不等式
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881fe2df23c5a0fe1d1fecbe9ffa55fb.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27c24244b1fdbf1455087c2ebf41c8b.png)
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【推荐3】设函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47953d3c1b8092d7d8b8db1e0a82d6c5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaffd65121dbf3689dc751b5b953a4fb.png)
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(2)在(1)的条件下,记
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
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【推荐2】已知
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【推荐3】已知函数
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【推荐1】(1)已知
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【推荐2】求下列函数的最值
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【推荐3】(1)已知
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