解题方法
1 . 已知
、
为方程
的两根,求
的最小值.
![](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/466fdf55433b08573a053083edb7bb35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7c2af390b1667150182cb9eea8fe3e.png)
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名校
解题方法
2 . 设
是正数数列,
,且
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9c167dc2de7663c031fec059996f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d4a165709c462216d1eb48ee9cceae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e18c54a4337b5987756f8bbd656638c.png)
您最近一年使用:0次
名校
解题方法
3 . 已知函数
,若存在非零实数
使得
,则
的最小值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba7eda6b3e8f83f097f405f995c0ba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0ae78240249772a407fc55a9f2a542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f164e2348de7d9967b1832004db124.png)
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