专题2.3 第二章 数列(B卷提升篇)(浙江专用)
参考答案与试题解析
第Ⅰ卷(选择题)
一.选择题(共10小题,满分50分,每小题5分)
(2020·安徽省六安一中高一期中(文))
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f632abb256102b31adc690f3229484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62cd25deef9f3eb924d9cfe623de11e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77288bfa684c2a9ca00c75743232a0e3.png)
A. ![]() ![]() | B. ![]() | C. ![]() | D. ![]() |
【知识点】 确定数列中的最大(小)项 累加法求数列通项 对勾函数求最值解读
(2020·安徽省六安一中高一期中(文))
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55feca124a3c380c2e7089c897da73e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/939c3192f4fe7512daf9efc47a6a3bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
A.31 | B.36 | C.42 | D.48 |
(2020·河南省高三月考(理))
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/904205b4e0d2b28e3b7889cab029d578.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 等差中项的应用 等比数列下标和性质及应用
(2020·河南省高三其他(理))
![](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/42a6fcfd068f6612ed5b0117b2360a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a649b5bf396e810f21660e0f98518d1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa37e5661af68b263a3ed9030d4e9003.png)
A.![]() | B.4 | C.![]() | D.![]() |
【知识点】 等差数列通项公式的基本量计算 等差数列前n项和的基本量计算
(2020·唐山市第十二高级中学高一期末)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663bbc5767b9cb453cb08e1f0a8e0602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cc3d4c0551486463dbd37f77afbd36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c88c05c564a3fb65c334bf1b8302773.png)
A.62 | B.124 | C.126 | D.154 |
(2020·嘉祥县第一中学高三其他)
![](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/478421b81927e435cbcf5acafa89efd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab2956e9b52f76202f31dd84ad8161c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c874ca2076375990a8b4bcdb9248c3e1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 两个等差数列的前n项和之比问题
(2020·宁夏回族自治区固原一中高三其他(文))
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9fe60ee148f5809e20b9028910cd0df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bf13d4507d821be89aedfff701794b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 等比数列通项公式的基本量计算
(2020·安徽省六安一中高一期中(文))
![](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/b95a1c9b86f4d0024c80b41a8cfea8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32a4fb128e52e9a8daf2025e25a14b2.png)
A.4 | B.6 | C.7 | D.8 |
【知识点】 等差数列前n项和的其他性质及应用
(2020·河南省高三二模(理))
![](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/8a676cba8634868e0ce7d93b3ff00fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e23e700c2dc5c7a85fe176a2cb87810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
A.14 | B.15 | C.16 | D.17 |
(2020·广西壮族自治区南宁三中高一期末)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce868748c024d7b93d65ad353a3f6265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1095329ab1e6fc01bcb8bb4b9c1cc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5ccc9d660aaeaf6bbc9cdd23bed856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55df059a3e31d7decf2e2a657541d43b.png)
频率 | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
半音 | C | ![]() | D | ![]() | E | F | ![]() | G | ![]() | A | ![]() | B | C(八度) |
A.![]() | B.G | C.![]() | D.A |
第Ⅱ卷(非选择题)
二.填空题(共7小题,单空每小题4分,两空每小题6分,共36分)
(2020·河南省高三其他(理))
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3299d1d394efc1381671b1632e6e87e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62fee6968933d39c6dfda0872d36b33d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
【知识点】 等比数列通项公式的基本量计算
(2020·江苏省海安高级中学高二期末)
![](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/4e0156a53fb55c2da2cdf01a62f00eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
(2020·天津高二期末)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6643dbcc2d816008babf6dde26555d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241389c63a75eb13215a8ade604f152b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679353e656a54993c041ebd39ec7b31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34981c8a718b9e5c5fa456a50cd68f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f456aa88cf0a4b0df8693c5aa4ed2a.png)
【知识点】 利用等差数列的性质计算 由函数对称性求函数值或参数
(2020·浙江省高一期末)
(2020·安徽省六安一中高三其他(文))
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b50b3927041221a53f19b6a0549d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db075166c52656ca589586a285ce6c8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.png)
【知识点】 由递推关系式求通项公式 裂项相消法求和
(2020·浙江省高二期末)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc27e6f98d1a468592999c59d913b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a1bf5c6f2c027a8308b339bc5bc9a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c88c05c564a3fb65c334bf1b8302773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02bb0c77fad71672acb9e5766fbf3069.png)
(2020·浙江省高一期中)
三.解答题(共5小题,满分64分,18--20每小题12分,21,22每小题14分)
(2019·云南省弥勒市一中高一期末)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6278d3cc0086c7aab6ac20712c7d0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d005409790b3192705a181b2c8e7dfed.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/08eb71ecf8d733b6932f4680874dbbf3.png)
(2020·河北省高一期末)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56655a01f881e04f1969089853280e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9631fc795e029139cd6b65b64a87cb1e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fe44dab672c37b60f97de0040be87a.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2020·安徽省六安一中高一期中(文))
![](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/8285a539b3c133eb19b8bee2ac92819a.png)
(1)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4a67138f29758d025473086601cef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73fc6d2fe066da453880f19ec5d84f46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119367f3474f3e3b4020040868e5a5b1.png)
【知识点】 错位相减法求和 利用an与sn关系求通项或项
(2020·四川省成都外国语学校高一期末(文))
![](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/ae2e6956e0073cef684fef6a16bead0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ced72f99d3e93cec09c40f24089b86.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78269461818d6d4df74427dc0a61aba.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/e15526f7c892333030073b85fc3baee6.png)
(2020·天津高二期末)
![](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/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a78b7637aec1f349b30617422970b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645632993919a478110143f27480d185.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28e407901d107954f0f833919f1f9c0.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/cb26cd1601fe7e76e1e2dc0b4909324a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27d13d0bae3d425554706f8dd6499c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
【知识点】 由递推关系证明等比数列 裂项相消法求和