已知数列
的通项公式为
,画出该数列的图象,并判断该数列是否有最大项,若有,指出第几项最大;若没有,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/592037053d179e4f1e1c605172b1311d.png)
23-24高二上·全国·课后作业 查看更多[3]
更新时间:2023-09-11 17:26:53
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【知识点】 确定数列中的最大(小)项
相似题推荐
解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】已知数列
的通项公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b97764daef03cac8b9e894376f5a432.png)
,数列
的通项公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2910fb46cf711b97ef4fa27172f7d7f0.png)
.
(1)
是不是数列
中的一项?
(2)判断数列
的单调性,并求最小项;
(3)若
,求满足
最小的
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b97764daef03cac8b9e894376f5a432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a762be884db5970a6639a7faaa7ac34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2910fb46cf711b97ef4fa27172f7d7f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a762be884db5970a6639a7faaa7ac34.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7ccb1c681e0e2be4e837f956dfbde1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55378ab3d691ac6ae7655c90b84b927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf84585f79de334b5b5d07d71f5448a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】如果数列
的前
项和为
.
(1)求数列
的通项公式;
(2)求
的最小值.
![](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/564b2cfefc99742c601884033b86d542.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次