在等比数列
中,
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40317a8a0ec71d5ce1677f0addc5d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c5c4ac959eb2c4b74afabc9cdd3a6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
更新时间:2021-05-19 14:12:33
|
【知识点】 等比数列下标和性质及应用
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【推荐1】在等比数列
中,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eacdac5ff0ed222a4dba42b6e66f4d41.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60ba0cbf0e593cf8bcd2adddf47e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eacdac5ff0ed222a4dba42b6e66f4d41.png)
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【推荐2】已知
为各项都是正数的等比数列,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac747c35fd4ca9cac41456d0c0f231f5.png)
__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e62db573346db10e9eb4ecd02e7887e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac747c35fd4ca9cac41456d0c0f231f5.png)
您最近一年使用:0次