若
是公差不为0的等差数列,
,
,
成等比数列,
,
为
的前n(
)项和,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6849b5fd0a2e79dd05af13ee5d5f8e89.png)
23-24高三上·黑龙江哈尔滨·期中 查看更多[3]
黑龙江省哈尔滨市哈师大附中2024届高三上学期期中数学试题(已下线)考点7 等差、等比数列的联姻 2024届高考数学考点总动员【练】(已下线)专题09 数列的通项公式、数列求和及综合应用(9大核心考点)(讲义)
更新时间:2023-11-30 08:44:01
|
相似题推荐
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐1】已知等差数列
和正项等比数列
满足
,则数列
的前
项和为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a428a29ddba2a95a4edf680de837d143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3258684deeddbebc73ca189aacc8e88b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.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】设等差数列
的前
项和为
,若
,
,则当
取最小值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
_____________ .
![](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/a75739be7640de2ab1c3e191b9857a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412d049ffcf7dfb5750043105102c141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
填空题-双空题
|
适中
(0.65)
解题方法
【推荐1】设等差数列{an}的首项为a1,公差为d,前n项和为Sn,且
,则d的取值范围是__ ,若
,则d的值为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7009ad74bdf36517ec5fe2f29a34fe14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff3b0bd804b9b717fea917003216716c.png)
您最近一年使用:0次
【推荐2】已知数列
中
,且满足
,若
的前
项和为
,则![](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/69b21f846c91c05d4c5e316a5d937b7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f941b9960240fee8d1101e77ed1a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91adba8efbf964e9e35547b0fd0ea36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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1】定义域为
的函数
满足
且
成等比数列,若
,
,则满足条件的不同函数的个数为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417f684942f85c7621e3db2180b081c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a14e10850a35bbe96a8681a5c15ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8ffb1e9b74ad0580e3df5dd4fae117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87cd4403487962c38c8707ba3ab3fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e5a729d14194f08eb4b3307c2d1e46.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】已知各项均为正数的等比数列
,
,
,则
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b3ef347c4dd0123db2a555bd761084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b849820138a1110c3036300c2543975f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d06ef951f417999eb27a611d385c1a31.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
【推荐1】已知数列
的通项公式
,设其前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bff73cd8f87bb7e23159e5a627e224.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/614306cc3f34bdee4d5d885b79667645.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐2】请写出一个同时满足下列三个条件的等差数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
____________ .
①
;
②对任意的n,
,都有
;
③给定
,对任意的
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b270a87d8e670809520e33c85bc3899a.png)
②对任意的n,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f29c06a3e9a73e905eb87d71efa201c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779e9149ba728f3951308a2d9d5696f5.png)
③给定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f29c06a3e9a73e905eb87d71efa201c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda8b95d3f68c24ccf94c17bd7c95a22.png)
您最近一年使用:0次