已知数列
的通项公式为
,c为常数,
.
(1)求
的值;
(2)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a125fc2cbf561ec9368260449808e593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1615e9bfa3479d51d79828cfc6246668.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ecf199a605dfc8db4a5721aaa70e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2023-12-20 11:07:05
|
【知识点】 判断或写出数列中的项
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解答题-问答题
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较易
(0.85)
解题方法
【推荐1】已知数列
满足
,
,设
.
(1)求
,
,
;
(2)判断数列
是否为等差数列,并说明理由;
(3)求
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20210b321be585d32e425a6a4de3ca73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57908072f697998145c4605d891583fc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57483e04fd1840c87ac5325157149877.png)
(2)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
解题方法
【推荐2】已知数列an=
试求a1+a100和a1-a2+a3-a4+…+a99-a100的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3179ce218f64764a7cdadba835e1d76f.png)
您最近一年使用:0次