设正项数列
的前n项和为
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0e3d8bc57aa79882ca671acf56e41b.png)
(1)求证:数列
是等差数列,并求其通项公式
(2)设数列
的前n项和为
,且
,若
对任意
都成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0e3d8bc57aa79882ca671acf56e41b.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03f9740fdb53458519740d698294fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ee490f0c45923503f996c5d2037c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
18-19高一下·四川乐山·期中 查看更多[6]
【校级联考】四川省乐山十校2018-2019学年高一下学期半期联考数学试题2020届山东实验中学高三第二次诊断性考试数学试题(已下线)考点20 数列的综合运用-2021年高考数学三年真题与两年模拟考点分类解读(新高考地区专用)(已下线)专题20 数列综合问题的探究-2021年高考数学二轮优化提升专题训练(新高考地区专用)【学科网名师堂】(已下线)专题4.1 等差数列与等比数列-备战2021年高考数学精选考点专项突破题集(新高考地区)江苏省吴县中学2020-2021学年高二上学期10月阶段性测试数学试题
更新时间:2019-05-23 10:47:34
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相似题推荐
解答题-证明题
|
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名校
【推荐1】若数列
的每一项都不等于零,且对于任意的
,都有
(
为常数),则称数列
为“类等比数列”;已知数列
满足:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7133d8f39bd3d597198563ad577015fa.png)
,对于任意的
,都有
;
(1)求证:数列
是“类等比数列”;
(2)若
是单调递减数列,求实数
的取值范围;
(3)若
,求数列
的前
项之积取最大值时
的值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f176e92b6f8ef75cfc37ab3d0924b992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7133d8f39bd3d597198563ad577015fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893e658908683584084ea8cd2b1abb23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68bc8c37a873dcc782a4e1c8a537f313.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace968f5d3c9ed7ff2fc4c15aff5d65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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解答题-问答题
|
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(0.4)
名校
【推荐2】已知函数
的图象经过点
和
,记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a941fd5008f9ef49e8adad40063b4e.png)
(1)求数列
的通项公式;
(2)设若
,
,
,求
的最小值;
(3)求使不等式
对一切
均成立的最大实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2a119403159f251ca90d8b6f23ecbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea1f5bdd213c7c3a571b4c38850bf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79485e42b7546ccfa3cd6d08491460f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a941fd5008f9ef49e8adad40063b4e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d3d55a85012933f91c5d8d27d8801d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d47456f316f2a761cf3f081decf3d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec6a5cb93ba04f2e1b9209f8c4642e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)求使不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a04b7defcd768444d1cce4990548b3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
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名校
解题方法
【推荐1】若数列同时满足:①对于任意的正整数
,
恒成立;②若对于给定的正整数
,
对于任意的正整数
恒成立,则称数列
是“
数列”.
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9a8ce4e92e0069ce0bd57396772f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af90aba749c812fd56ffa2dd4e414dc.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d129dfd51ca2d74bb02d01ae46ab168d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252f7e961c3b716ebcb4cc4bdb94b1cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b5891a2e6d7b1bf25a78a3c5c55cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f6e3d89bd75f8ff2068d4bbcf26fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8541cfcfab41a5a4b7d40bd6c6fe3048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85464ad89ff6d081e57a97e057c1b92e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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解答题-问答题
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较难
(0.4)
解题方法
【推荐2】定义:对于有穷数列
,将数列
中项
后边比
小的项记作
,(若
是
的最后一项,则
),则称数列
是数列
的统计数列.
(1)若数列
为8,3,a,2,4,
的“统计数列”
为4,2,1,0,0.求实数a的取值范围;
(2)若
,其中
,且
不是常值数列,m>2且
,若
,求数列
的统计数列
;
(3)定义在
上的函数
满足
,且对任意的
都有
成立,
,
,设
,记作
的统计数列
,在所有可能的
中,求数列
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233427826eb2233641fc3a9805f6d206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6510d0816033afa001c130342bb7cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d4398fb6c1aa991e52d98dc1e0b05c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52befe3e5a8bf5ba9a8676a0de3eace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f364bd19eda02fa19a278441b2aa401b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a46db968c9d307a5505bbc546407b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
(3)定义在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf6bdbb5f48bd7ae57018ebf154cad6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4ac2076c1aac22c6aeea8463f8a93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f0ab8bd59941ba3056cc4edcffc9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510a1a52d943d712e50abe98f2b8953d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8acac571c064dbcd498a7e84ffaff08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebce3796deaa09862fe1524abe6974c0.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960b682f983b053dc9064cf29c97e250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/440afe27e8558f6bf35c8713ce5664b2.png)
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