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)
19-20高一下·上海嘉定·期中 查看更多[2]
上海市上海外国语大学嘉定实验高中2019-2020学年高一下学期期中数学试题(已下线)4.1数列(备作业)-【上好课】2021-2022学年高二数学同步备课系列(苏教版2019选择性必修第一册)
更新时间:2020-06-07 11:32:12
|
相似题推荐
解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】在数列
中,
,请回答下列问题:
(1)这个数列共有几项为负?
(2)这个数列从第几项开始递增?
(3)这个数列中有无最小值?若有,求出最小值;若无,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbf4094226706977dd91c9433301393.png)
(1)这个数列共有几项为负?
(2)这个数列从第几项开始递增?
(3)这个数列中有无最小值?若有,求出最小值;若无,请说明理由.
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】已知数列
是首项与公比都为
的等比数列,其中
,且
,且
是递增数列,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b03a35ff4d20054dbf88749fe5d32ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】已知数列
是公差为2的等差数列,且
成等比数列.数列
满足:
,
.
(Ⅰ)求数列
,
的通项公式;
(Ⅱ)设数列
的前n项和为
,且
,若对
,
恒成立,求正整数k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d18994be6358418426625d76f65350ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1dd6791dad7e5d6d020ed378240909e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(Ⅱ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6021804e4679817d126478d79ad83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2f40e9b5e0041cbc4488be8202b577.png)
您最近一年使用:0次
【推荐2】已知数列
的前n项和为
,满足
,数列
满足
,且
.
(1)证明数列
为等差数列,并求数列
和
的通项公式;
(2)若
,数列
的前n项和为
,存在
,使
成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8652d8b8352dbb108fe5afef5816cce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195431ccf2756a0db26f14b7b91a32a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a07fe72ebffc29b8befca75ffa7451e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23cc408e32508f8faafbb8042c6fbefb.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e43cf1baaecf30fa718b18705726cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195431ccf2756a0db26f14b7b91a32a7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd5666265299ddf5c2ec6acf16e3a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b746bcdc31cf4c762de11a410165ab21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ad4897a05a6a26b10e2d8379137fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937c80cc2a80676c2dcc5fbb0fc1cce9.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】数列
中,
.
(1)
是数列中的第几项?
(2)
为何值时,
有最小值?并求最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a162bef78b46c852ecbb1fd283fe0c.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b837fd9c52f60bfb3b6852733abc790.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】已知数列
的通项公式为
.
(1)0.98是不是数列
中的项?
(2)判断此数列的单调性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b97764daef03cac8b9e894376f5a432.png)
(1)0.98是不是数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)判断此数列的单调性.
您最近一年使用:0次