已知正项数列
的前
项和为
,
,数列
是公比为2的等比数列,且
.
(1)求数列
和
的通项公式;
(2)数列
,
的所有项按照“当
为奇数时,
放在前面;当
为偶数时,
放在前面”的要求进行“交叉排列”,得到一个新数列
:
,
,
,
,
,
,
,
,…,求数列
的前
项的和
.
![](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/1928d8e099e2524284f37febabca37a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c968ef8f37cbc55d57380015e0229f77.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)数列
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57483e04fd1840c87ac5325157149877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a548938d87c80ac47910607d3857007f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95184a1a20419163065949815e54f174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f0818bdac0985b3a823200d552f29f.png)
更新时间:2023-07-06 08:46:16
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知
是等比数列
,
.
(1)求
的通项公式;
(2)若等差数列
满足
,
,求
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c5c4ac959eb2c4b74afabc9cdd3a6b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c340fdadffa2f9120a70430ce477f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3fff17b6f8d3d05752501b9ef03fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知函数
的 图像经过点
,
,
为数列
的前n项和.![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/b1b6d41e1256498bb31b8f331e2efb72.png)
(1)求
及![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/dd7133cdce62452c8d3e22ea930ffd71.png)
(2)若数列
满足
,记![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/68d49f8d51e945059f9ac4d364e0c422.png)
,若
对
恒成立,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/04fa8119b66647d99246c101b25d5a91.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/a580e6b5f95a4a5da3c0daf818e8df45.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/aad6727a9e4e48cb89c4684753712b2b.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/9bab4b7c9fad4459acc0a6b30c64589e.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/79b35198fead4116a044ea29105df578.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/b1b6d41e1256498bb31b8f331e2efb72.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/25beca59b40a4bde9720d7aa58f894b1.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/dd7133cdce62452c8d3e22ea930ffd71.png)
(2)若数列
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/0adb2a0d6fea4823a36bd3602100ceea.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/fb7a8e8f42bd4feba3e6255eea8dbc03.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/68d49f8d51e945059f9ac4d364e0c422.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/b1b6d41e1256498bb31b8f331e2efb72.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/e7443c31e5cd4ed4b495c8e536149b1e.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/b1b6d41e1256498bb31b8f331e2efb72.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/259e860191f74ddf948f35461b15324c.png)
您最近一年使用:0次
【推荐1】已知数列
满足
.
(1)证明:
是等比数列;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e169fdbb4882cba8d1cf544b700e4c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213e22890204937a5dded4436369390f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0164724dad041b52fa0679685697cc8c.png)
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】在数列
中,
,且对任意的正整数
,都有
.
(1)证明数列
是等比数列,并求数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efdc667453c13b09a35845d79e5edea.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e2ed254a138cb416a6f70cdb3106206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】已知数列
是等差数列,其前
项和为
,
,
,
是等比数列,
,
.
(1)求数列
的通项公式;
(2)求数列
的前10项和
.
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fcd86b9ed6819116a261629f96fae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0112a2f039490f6f492f1a9d9ca5b2c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4995fa0403e013d888c0935ebfe15024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15cd7848f939e91a3e02b9a7b6f412b5.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3cf40c3b4e46c1c52d7eadff64a9ec4.png)
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】在①
;②
成等比数列;③
;这三个条件中任选一个,补充在下面试题的空格处中并作答.
已知
是各项均为正数,公差不为0的等差数列,其前n项和为
,且 .
(1)求数列
的通项公式;
(2)定义在数列
中,使
为整数的
叫做“调和数”,求在区间[1,2022]内所有“调和数”之和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bdc3bd67e6d023275dde75933b095b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b2d597a007bf33b6cb7e2124dd74b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8000fb7f840617503890d70eeccc7de6.png)
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)定义在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673159d75dfa7682ff5617cdce4db695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
【推荐1】已知数列
是数列
的前
项和,已知对于任意
,都有
,数列
是等差数列,
,且
成等比数列.
(1)求数列
和
的通项公式.
(2)记
,求数列
的前
项和
.
(3)记
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6118d99ea5ce8feb86c2edfa9863b78c.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/05ec09a5b5fd94c1dd994a759907ef1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6236cfb43def832ee82170a3957976ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ccfb41895ec7f30f66ccff2649cab86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c3fcf2d55d332154010c79b64692aca.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09646bdcb56e52245c84d948b915b681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a46bd27de9efc3438c3ff2561e1c443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e3cd79c7edcf79e64ed8d7aec2b9c58.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知数列
的前
项和为
,且
.
(1)求
的通项公式;
(2)已知
,集合
中元素个数为
,求
.
![](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/905839bd6bcb1dd50fe08487cef618c9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad52924df9291d5d191d18e09374ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72363e089979c51336e48cc323c66f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233427826eb2233641fc3a9805f6d206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4dbabc5555a57369708a62a4be6b81.png)
您最近一年使用:0次