设数列
是递减的等比数列,且满足
,
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba659eb5d49473321f6311a565ec45b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac17ada168a58e3319d401930e51218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e1d9d3c10d870d08f772606189b1e9.png)
更新时间:2019-04-24 07:07:26
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适中
(0.65)
【推荐1】已知数列
满足
,
,且
(
,
),则数列
的通项公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac00caef909446d62dd82f5ce746a540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b03bebc8aba0a6a1cbd47dd5410a823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dafd98e5b223908b13013c3cacc0386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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适中
(0.65)
【推荐2】在等比数列
中,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c5a364c4c2ee47a240b6634c71419a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
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解题方法
【推荐1】在等比数列
中,
,
是函数
的两个不同极值点,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/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d6a70385455871e9a7b17b2e71a77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
您最近一年使用:0次
填空题-单空题
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(0.65)
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【推荐2】若数列
为等差数列,
为等比数列,且满足:
,
,函数
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0f67ecc63958183b70e106534d38b5.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e58b771199b74cf265e162a8c3f9df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180a92df4367f5d8d784af0f919c60aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b923078510697d5f7f9ea392eb76dd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0f67ecc63958183b70e106534d38b5.png)
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