设
是正数,求证:下列三个不等式:
①
;
②
;
③
中至少有一个不正确.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d10449bc77d692a7270e0f20a68cdf2.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c327f3961db1ed918efa7767b2eb488.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142aa9bf5c24fa64b8de9e473d0d9461.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38c1a2b1e0d8efc004a083482267c2c.png)
更新时间:2020-04-08 13:16:17
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解答题-证明题
|
适中
(0.65)
名校
【推荐1】(1)用分析法证明:
.
(2)已知
,且
,求证:
与
中至少有一个小于2.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee49476a298e4c004a956575f7f4f6af.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4ac2076c1aac22c6aeea8463f8a93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9e131cdd242d56b6dba05ab3363ef3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a2b29b47d6c7753d5359883c105c68d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】(1)证明:当
时,
;
(2)已知
,且
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与
中至少有一个小于2.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c7d4de990b0b493f941de3cbe24ffd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4ac2076c1aac22c6aeea8463f8a93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9e131cdd242d56b6dba05ab3363ef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fe4e9871c2acac03e9a3388fd2877e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a2b29b47d6c7753d5359883c105c68d.png)
您最近一年使用:0次