数列
、
满足
,且
、
是函数
的两个零点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208b4d763aaeb2bade6b9fc6f418ee8b.png)
________ ,当
时,
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381576e698a46df8c497e6b5f8346ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7085d141e33ba0188e58fa2177d89ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a9cb3b8f650e841be34174cccd7093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99fa23dc6a66ce4c86d339bc6a1b7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208b4d763aaeb2bade6b9fc6f418ee8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b555dce0c4e6f278e8eadc3d37ca13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
更新时间:2017-07-21 08:38:31
|
相似题推荐
填空题-单空题
|
适中
(0.65)
【推荐1】已知数列
中,
是其前
项和,若
=1,
=2,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aab38ba6884c6487ba2a86b8f00d39a.png)
且
,则
__________;
=_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://img.xkw.com/dksih/QBM/2011/3/21/1570049212604416/1570049217880064/STEM/61b1dbc65c5e40459296aa080c503cba.png?resizew=13)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aab38ba6884c6487ba2a86b8f00d39a.png)
且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46c2b59c48b8680c8b3e206d92ef074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78eedb9db369c65f61be028a12ee5fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772e1830de8a5b2bede8f5614d93a1d2.png)
您最近一年使用:0次
填空题-单空题
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适中
(0.65)
解题方法
【推荐1】已知数列
中,
,
,则数列
的前n项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f4e1236d7dc0366d9523d0cbb426be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a36a34da9d7a3c4599a52ee2311a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099a64d86bd0b4602578d910322adc1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐2】已知首项为2的数列
的前
项和
满足:
,记
,当
取得最大值时,
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7833430afb8b1f9743153e96336218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639bdadf2042f71bc80fd0cbdc3fe99f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次