名校
1 . 数列
是各项均为正数的等比数列,数列
是等差数列,且
,则
![](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/3a0258f11b3d6c361afec0e3cdfeb6c8.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2018-07-11更新
|
1273次组卷
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6卷引用:【校级联考】山东省淄博市部分学校2019届高三5月阶段性检测(三模)数学(理)试题
名校
解题方法
2 . 已知正项数列
是公差为2的等差数列,且
成等比数列.
(1)求数列
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bdbde4eb7e4d4033bb9053b6c806e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2b620c000a4b62e8cf2622203d3b0e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](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)
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2018-05-08更新
|
1221次组卷
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5卷引用:【全国市级联考】陕西省榆林市2018届高三高考第四次模拟理科数学试题
解题方法
3 . 已知等差数列
的前3项分别为1,
,
,公比不为1的等比数列
的前3项分别为4,
,
.
(1)求数列
与
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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268bebee8d786afc197d2299260b87f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7311dd27a91ef55ef4056c727cf4d5.png)
(1)求数列
![](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/b747cae51e50378aae057f245c1f6f46.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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2017-12-21更新
|
1245次组卷
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3卷引用:河南省2018届高三12月联考数学(理)试题
解题方法
4 . 已知是等比数列
,公比
,前
项和为
,且
,数列
满足:
.
(1)求数列
,
的通项公式;
(2)设数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.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/a1fec2e562ab63877b00c8cc6f3f04fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3083bb76b07e9b31f28264d606e768.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c2a380f89778d8f452f204aa73536f1.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/f1cb91e89800a81f4d62ed75c3ace24a.png)
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2017-12-11更新
|
714次组卷
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2卷引用:安徽省蒙城县第一中学、淮南第一中学等2018届高三上学期“五校”联考数学(理)试题
5 . 已知正项数列
的前
项和为
是
与
的等比中项.
(1)求证:数列
是等差数列;
(2)若
,数列
的前
项和为
,求
.
![](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/da05821a261a217c82db4fdfefb1dc4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26da68db818bb8bd7edb4ac53bc77bc4.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d3d55a85012933f91c5d8d27d8801d.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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|
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|
7卷引用:河南省郑州市一中2017-2018学年高二年级上学期期中模拟数学试题
6 . 已知等差数列
的公差为2,若
,
,
成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2da0ff9dc73d62f8162fc3de186150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.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/ad2da0ff9dc73d62f8162fc3de186150.png)
A.2 | B.0 | C.![]() | D.![]() |
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2017-10-10更新
|
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3卷引用:广西钦州市2018届高三上学期第一次质量检测数学(理)试题3
7 . 在等差数列
中,
,且
,
,
成等比数列,则公差![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73beab6c3552805de18790aaf469977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5307f76ac3c29a5a3db26a58b120b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
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9卷引用:山西省2017—2018届年度高三名校模拟考试第一次五校联考 数学(理)试题
山西省2017—2018届年度高三名校模拟考试第一次五校联考 数学(理)试题湖北省部分重点中学2018届高三上学期第一次联考数学(文)试题山西省长治二中、康杰中学、忻州一中等五校2018届高三9月摸底考试数学(理)试题河北省邢台市2018届高三上学期第二次月考数学(文)试题河北省邢台市2018届高三上学期第二次月考理数试题(已下线)狂刷26 数列的综合应用-学易试题君之小题狂刷2020年高考数学(理)河南省豫北名校2020-2021学年高二上学期11月质量检测数学(理)试题陕西省宝鸡市2021届高三下学期大联考理科数学试题(已下线)第03讲 等比数列及其前n项和 (高频考点—精讲)-2
名校
8 . 在递增的等比数列
中,
,
,其中
.
(1)求数列
的通项公式;
(2)记
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d675c6f84f7fbf86ca11e350b54fb096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e4c1461db5cef4877add905c03ed97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77bc5ce1b00bd6c17064b581e827798d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3debee8173621c3a45ffd230471bbe3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
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2017-10-03更新
|
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8卷引用:衡水金卷2018届全国高三大联考文科数学试题
9 . 已知公差不为零的等差数列
的首项
,
,
,
成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6352928c4a258265b912eef8a04569b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbd5c4bf79d0ebde9ce82521c44df228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5bbae9353140c2235610852d04a9a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f5315069aa68daeb882d95efecc9d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6352928c4a258265b912eef8a04569b4.png)
A.238 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
10 . 已知数列
的前
项和
,数列
满足
.
(1)求数列
的通项公式;
(2)求数列
的前
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/6a3bc907fe03ad648a78548de36bcc6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3311865fe3171c386ec87bcd27c55f.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2017-09-04更新
|
1778次组卷
|
3卷引用:江西省南昌市2018届上学期高三摸底考试文科数学试卷