设
比较
与
的大小,并用合适的方法进行证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f537e4edbfd73bb006c480f313a65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31c5582673c521cb8217b578d62d4b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d637eb72a1e499f98fbb29753f56382f.png)
更新时间:2021-10-10 17:24:35
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】对于四个正数
,如果
,那么称
是
的“下位序对”.
(1)对于
,试求
的“下位序对”;
(2)设
均为正数,且
是
的“下位序对”,试判断
之间的大小关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8532dd0af6505840756e8f520a07e410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17be08ad8a41b18c0d747a5e545cfc6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a633e36c3ff229597a6baac9531ea3f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda6ccd570eabf8771e93172adaf08b5.png)
(1)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3adb8d2e38a9d04b0e4eab8f5d7172e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f99c97b817837395b54040a1db93cf1.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7860e2bdde5a0d236be2908d70437aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af6821fe57c826d3f46536ad0faf382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07156ffd0d05d994c32acfd57b605493.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e848a05fbeba551960e340b7ea38dba3.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知不等式
的解集为
.设实数
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c1cae3fd6ef0117c79db7eb7ccd3f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c37d5b381e11f987dbf85b3ea820dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9689403e531b25d32b78c47d918587b1.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】(1)求证:
(其中
)
(2)已知
、
、
、
都是实数,且
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2753dee1cf2935ce2f46ef406fc0e15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a671406a5442a3088a4ee1d064114a.png)
(2)已知
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04959523a28786962d51cfb43a8767d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70a92f426264c24f324cab3dc8017f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0950c6ba9c0ff6b53f9231a7eec44d1.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】选用恰当的方法证明下列不等式
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679e658fa5679ce73e1b5fdfe434b724.png)
(2)已知
,证明:
.
(3)已知a,b,c均为正实数,求证:若
,则
.
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679e658fa5679ce73e1b5fdfe434b724.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa4f85f4d4f4bd9edaa8a964565ca1a.png)
(3)已知a,b,c均为正实数,求证:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a57e060f61f7efa54982bda67db483a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d54c9eb01acfe09c34cb808326cc5e.png)
您最近一年使用:0次