定义行列式运算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783b15b916672ddca749ed64109bd01.png)
,若函数
(
)的最小正周期是
.
(1)求函数
的单调增区间;
(2)数列
的前
项和
,且
,求证:数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2803b474b5f8f96c7e6e9e741e20d073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783b15b916672ddca749ed64109bd01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f1955111f224144de4fb2aa8c2eec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df627f96dc798f392b45581d2796df5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7109f604b724dfab348530752a0891ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7df78e3319e7592af36eacedf746b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf893b061515c5b9e7979e12b2af5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02e80983b88cdf6b540502816c87d13.png)
更新时间:2020-05-23 12:32:58
|
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【推荐1】已知函数
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【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf37898700f118daeac10fe61b10c43.png)
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解答题-问答题
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适中
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解题方法
【推荐1】正项数列
的前
项和
满足:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806a9750801f80c9a6832b6a8f22d318.png)
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,都有
.
![](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/806a9750801f80c9a6832b6a8f22d318.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)令
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
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您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】设数列
的前
项和为
,满足
.求数列
的通项公式.
![](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/e3b412c37ba291adc6ca4450c2c5b827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次