已知数列
满足
,
是公差为
的等差数列.
(1)求
的通项公式.
(2)令
,求数列
的前n项和
.
(3)令
,是否存在互不相等的正整数m,s,n,使得m,s,n成等差数列,且
,
,
成等比数列?如果存在,请给出证明;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4123422b5a6621da6a3214aa8c3e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099a64d86bd0b4602578d910322adc1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dbc3b9ad99da1f31b0a598f6754c7c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92a64999ed95ead1707c7aca94cbbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c8f3b95cf758b56f0b94a261272fe82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8384f67b3cd493b9b1062908c0128214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82a4d8875890196df49fc7d6944161e.png)
23-24高二下·广东佛山·期中 查看更多[3]
广东省顺德区北滘中学2023-2024学年高二下学期期中考试数学试卷广东省佛山市桂城中学2023-2024学年高二下学期第二次段考数学试卷(已下线)专题07 数列通项公式与数列求和--高二期末考点大串讲(人教B版2019选择性必修第三册)
更新时间:2024-05-11 20:11:11
|
相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】已知函数
的定义域为
,数列
满足
,
,
(实数
是非零常数).
(1)若
,且数列
是等差数列,求实数
的值;
(2)若
数列
满足
,求通项公式
;
(3)若
,数列
是等比数列,且
,
,试证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a127829802e91b5c4159c48559f8b05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13ee40e6cfa757f60396a5a93202c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f4fa7f7b4e9d5a597ab7e391e39979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89d881a0d3e8b9163cea2eb0e4520ab.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02f266bd253738e315e84231235f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4755688499394db8e37a068c81d4218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f115d53f9225d717532bb26caa4fc63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c293d83d969ee338fccdee1f462c028c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa752c4aaa105721ecf53d236c648b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a127829802e91b5c4159c48559f8b05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5031d2d86e3326107e88fbefe9cb592.png)
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【推荐2】已知公差不为零的等差数列
中,
,且
,
,
成等比数列,
(1)求数列
的通项公式;
(2)数列
满足
,数列
的前n项和为
,若不等式
对一切
恒成立,求
的取值范围.
(3)设数列
的前n项和为
,求证:对任意正整数n,都有
成立.
![](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/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954509b571b79f29c6c4471739b13ae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b75995b40e350ac63a4d65ebdd484ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ede4b754c6562f640fcb902762211d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c630e43e5d13917535764543a3836b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e951566b3babcaa411bcac60f21a9221.png)
您最近一年使用:0次
【推荐1】设满足以下两个条件的有穷数列
为n(
)阶“期待数列”:
①
;
②
.
(1)分别写出一个单调递增的3阶和4阶“期待数列”;
(2)若某
(
)阶“期待数列”是等差数列,求该数列的通项公式;
(3)记n阶“期待数列”的前k项和为
(
),试证:
(i)
;
(ii)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ec0b97655e6bd7004df04457c493ac.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa0fca4198a6d5c5b76e5e1716dc4e2.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4830a6ec5e0ffd7074b854b4ecdc19.png)
(1)分别写出一个单调递增的3阶和4阶“期待数列”;
(2)若某
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394aee19f94c2b70fcce1d69b31dc7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699dfd96d64e59252e384847629c7a75.png)
(3)记n阶“期待数列”的前k项和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0a9523f2084cf17b8656c11ab1d95e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541e541ef98215381bb9120cd39020ca.png)
(i)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7575a54621b480d9d1e0efa5935d8f47.png)
(ii)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fbfe923e23263b5ae34ee75bb430ab.png)
您最近一年使用:0次
解答题-问答题
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(0.4)
名校
解题方法
【推荐2】设
是各项均为正数的等差数列,
,
是
和
的等比中项,
的前
项和为
,
.
(1)求
和
的通项公式;
(2)设
,数列
的前
项和为
,使
为整数的
称为“优数”,求区间
上所有“优数”之和.
(3)求
.
![](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/6e0414c0b6fda7fee5eb71976e09da80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25da2f7115d4ec80c17705097b18a0b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad995e77f03281c4275c35e7628875b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.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/3a996c4e29bcc381353e072eb04c11b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5b653a209622a9136a15c3b11b0a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301b1cd82149b6f9cc0b962478dbe82b.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a11dc83213b4b92a20870c97670048f.png)
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解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐1】已知函数
,
.
(1)证明:
;
(2)若存在直线
,其与两条曲线
和
共有四个不同的交点,设从左到右的四个交点的横坐标分别为
,
,
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68cbe31433924ecca1849dd4348607ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a746e332151930493d548cc1c4b7ff7.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943ee35cf1dda502256a9a3a90a94778.png)
(2)若存在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af79f45b5880c72a349500da9d8e118d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990b6dc6b90ee98d5a95e1518bbd61b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e798a8fe1cd6b2e0c2cb462ac29dbc0.png)
您最近一年使用:0次
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较难
(0.4)
名校
【推荐2】已知函数
和
有相同的最大值.
(1)求a;
(2)证明:存在直线y=b,其与两条曲线
和
共有三个不同的交点,并且从左到右的三个交点的横坐标成等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c253250158e5f569496aacb7d2bf29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb73ca53360b7032a36797dfaa20fe7.png)
(1)求a;
(2)证明:存在直线y=b,其与两条曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
您最近一年使用:0次
【推荐1】已知数列
满足
,且对任意非负整数
均有:
.
(1)求
;
(2)求证:数列
是等差数列,并求
的通项;
(3)令
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c8359165247efe34010750f26d46e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9ea99ba88eef340963b02844479c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18ed08a8a00a6f28c99d6187dd9e7b1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268c6c8d3c84c8e5ad15914a6523c314.png)
(2)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059b107adae5bc42ccc708dfcf294b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13edce96379387415b4c8e996a92abe.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea77e8af1992366ab1a89f403df21aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d6b0b9351c651900bfb13ff1e936cd.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐2】若数列
的前
项和为
,且满足等式
.
(1)求数列
的通项公式;
(2)能否在数列
中找到这样的三项,它们按原来的顺序构成等差数列?说明理由;
(3)令
,记函数
的图像在
轴上截得的线段长为
,设
,求
,并证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/345307b291e338fbbd2bc86a39f53164.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)能否在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771991b0812e4ee2d678982c5461b86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c9752056ebb05a8e4eee608c34046b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59e7c7a84a4bdb959e95536d0404ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82433897679bbf03dab49684cbfec2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5bb9e8d8cd3f0a8c7f1c3f239bd351.png)
您最近一年使用:0次