14-15高二上·浙江温州·阶段练习
1 . 已知数列
满足:
,数列
满足:
,
,数列
的前
项和为
.
(1)求证:数列
为等比数列;
(2)求证:数列
为递增数列;
(3)若当且仅当
时,
取得最小值,求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/474a06c31af68a7e888c5bc5b00f3f8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89d1f32c1605cfdb8e8855051b9f6ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84144d13f952dea934039072202c8e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a86c32a512fd3866109dbdc9b258ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89d1f32c1605cfdb8e8855051b9f6ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求证:数列
![](https://img.xkw.com/dksih/QBM/2015/4/20/1572076167094272/1572076172795904/STEM/151f58378cf94634ac3d6c7bd836f491.png)
(2)求证:数列
![](https://img.xkw.com/dksih/QBM/2015/4/20/1572076167094272/1572076172795904/STEM/4e4177b5a11d4ee9b5d2a8d05abcce00.png)
(3)若当且仅当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
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4卷引用:2014-2015学年浙江省瑞安中学实验班高二10月月考理科数学试卷
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12-13高一下·云南昆明·期中
名校
2 . 在△ABC中,角A,B,C的对边分别为a,b,c,若acos2
+ccos2
=
b.
(1)求证:a,b,c成等差数列;
(2)若∠B=60°,b=4,求△ABC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba74999c37cf67be66325f0dc95b7cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d88c7cea23a2889664b3207f6f7b116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(1)求证:a,b,c成等差数列;
(2)若∠B=60°,b=4,求△ABC的面积.
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10-11高三·浙江温州·阶段练习
3 . 已知数列
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e7cdcfb943fbf4da65e8493514df367.png)
(1)求证:数列
为等比数列;
(2)设数列
的前
项的和为
,若
,求:正整数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e7cdcfb943fbf4da65e8493514df367.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35e76a86cf837e2359a0e6e45bc7526.png)
(2)设数列
![](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/1d779453c15ae2b16862d0a8ef84f144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2011·山东青岛·一模
4 . 已知数列
满足
,且
,
为
的前
项和.
(1)求证:数列
是等比数列,并求
的通项公式;
(2)如果对于任意
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89d1f32c1605cfdb8e8855051b9f6ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fe38728dde60e0be8237cf35308976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79904ffc0425df6f11aa243f1827465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89d1f32c1605cfdb8e8855051b9f6ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3a75084bebe9ef73f7a55e30bebc01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89d1f32c1605cfdb8e8855051b9f6ec.png)
(2)如果对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d726666f99a5a41dd673a2330e377b17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/166b9c23efb089f9b87b469fe14c939b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
5 . 已知数列{an}的前n项和Sn满足Sn=2an-n.
(1)求数列{an}的通项公式;
(2)设
,记数列{bn}的前n项和为Tn,证明:
(1)求数列{an}的通项公式;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c9dc190d0856e27a1cc225f766808e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc35cadd404e73a7c95cc49d417139cf.png)
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2016-12-04更新
|
916次组卷
|
4卷引用:2015届浙江省嘉兴一中五校高三上学期第一次联考理科数学试卷
名校
6 . 数列
满足
,
,
.
(1)设
,证明
是等差数列;
(2)求
的通项公式.
![](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/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3938fc9093a10b040b5ed9d18c876637.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5653b60d16ec4e653518f0562680250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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解题方法
7 . 已知数列
满足
且
(
).
(1)求数列
的通项公式;
(2)设
,且
为
的前
项和,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ae59002d0709bc01a451f98770ac25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d726666f99a5a41dd673a2330e377b17.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba85412fe5832f6ea81e4af4a94537c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ff515d1b62e9549b18a48a893ea795.png)
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8 . 设数列
的前
项和为
.已知
,
,
.
(Ⅰ) 求
的值;
(Ⅱ) 求数列
的通项公式;
(Ⅲ) 证明:对一切正整数
,有
.
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c7fb73589e0c281a28f6986ced7f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d726666f99a5a41dd673a2330e377b17.png)
(Ⅰ) 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
(Ⅱ) 求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(Ⅲ) 证明:对一切正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55507f6c61da06d1b5dbe8cdf8df64a4.png)
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9 . 设数列
的前
项和为
,且满足
,
,
.
(1)猜想
的通项公式,并加以证明;
(2)设
,
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606e55241a2e145d54849129b8ffd20f.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/be564b2a898921b894a6f17e4a4e9a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f678e7e04f2240adb433ed8e8ed40639.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606e55241a2e145d54849129b8ffd20f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/160cef6fb0a0ba28166626df387631e5.png)
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