解题方法
1 . 已知
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/938d320ca456580f2e4b6a5b36f91d19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef66c5988b5841f7a9e21a35019e3610.png)
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解题方法
2 . 若
.证明:
(1)
.
(2)
.
(3)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e006ef99c62e6c3784c5059c92aeba.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e974efdd9cf524a4c4b3c85e0328921.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2108c82f49e2e6df8f7cb60147172bc1.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db5aac415fa6302e451341cc02f99da.png)
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3 . 求证:对任意正实数a,d和负实数b,c,存在
,使得
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116bb8c0ecad0e1e1f1f804638c1a1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f293d0fc114aa8edc2f1529affff3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fda5601bcbe9dc4be4b17c11ebca18.png)
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12-13高二下·江苏·期末
4 . 设x,y,z为非零实数,满足xy+yz+zx=1,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709a81e592c2318dc2ff9dee55d029c3.png)
您最近一年使用:0次
2016-12-02更新
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2025次组卷
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4卷引用:2012-2013学年江苏省新马高级中学高二下学期期末考试数学试卷