1 .
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd8ec6fc551585f093d0a8848aace07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2829c117b291deabd43fdd524d253a26.png)
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2 . 设
满足
数列
是公差为
,首项
的等差数列; 数列
是公比为
首项
的等比数列,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4935544664f86edc57a0c3410fcf897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5217df154813a81ad37c406027e9f667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c6099506bd60534ed57a71e3678b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/affd21d3fc4f76dcc7fffa227541df28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6cc218c568cc9d08e620696d1f61f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e8e67f649bb2e18fc02d6118ff4e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/decb5e8546e79397586cbbdf0fc2e085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1f5a2d53d857943074a092006e110d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50dedd2d9712979cae558023a3ae94b9.png)
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12-13高二下·江苏·期末
3 . 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)
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2016-12-02更新
|
2028次组卷
|
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