专题卷 期中测试卷重点卷
一、选择题:在每小题给出的四个选项中,只有一项是符合题目要求的.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52153cd247c62030aaa74f3e0872162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b625c64d86ec867f605fea4b76ea92bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ed760284545096b16b09724f27d8b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaec3004937aab88c44e66753caab782.png)
A.![]() | B.7 | C.8 | D.9 |
【知识点】 由递推数列研究数列的有关性质 等比数列下标和性质及应用
A.1 |
B.![]() |
C.1或-1 |
D.2或![]() |
【知识点】 等差中项的应用 等比数列通项公式的基本量计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ba35c1e1c44db43ca898903058002a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b4d6b1913a656b36a2f8ed7001f894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63cd52efeb43773462830445b11f87e0.png)
A.1 | B.2 | C.4 | D.8 |
【知识点】 利用等差数列的性质计算 等比数列下标和性质及应用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e233fe2b29b0bb1e01409dfe0829fe.png)
![](https://img.xkw.com/dksih/QBM/2020/9/8/2545296802160640/2545628071133184/STEM/f79b83e0fe9e4f02a8a73ae939388e43.png?resizew=240)
A.![]() | B.30 | C.![]() | D.35 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f128b3fad87920012211b2d2cb540a42.png)
A.7 | B.8 | C.9 | D.10 |
【知识点】 利用等差数列的性质计算 求等差数列前n项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f96a6713b0e446b397339b967769b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe4c7689bfad3913eec2b359e8d93d04.png)
A.当![]() ![]() |
B.当![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() |
【知识点】 验证是否为等差数列中的项 验证是否为等比数列中的项
二、多选题(共4小题)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
A.a1=3 | B.数列{bn}是等比数列. |
C.an=3n﹣1 | D.![]() |
【知识点】 等差数列通项公式的基本量计算 由定义判定等比数列 求等比数列前n项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.数列![]() | B.数列![]() |
C.数列![]() | D.数列![]() |
【知识点】 由定义判定等比数列
A.a2>b2+c2,则△ABC为钝角三角形 |
B.a2=b2+c2+![]() |
C.a2+b2>c2,则△ABC为锐角三角形 |
D.若∠A:∠B:∠C=1:2:3,则a:b:c=1:2:3 |
【知识点】 正弦定理边角互化的应用解读 余弦定理边角互化的应用解读
A.分针每小时旋转![]() |
B.在![]() ![]() ![]() |
C.在同一坐标系中,函数![]() ![]() |
D.函数![]() |
三、填空题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3976d08e5f9e24e76ce9579c06a8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
【知识点】 三角形面积公式及其应用解读 求平面轨迹方程
【知识点】 等差数列前n项和的基本量计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cecda76b0ed110441e995cc5b645929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03bbcfce2a8c6901741b3644c4c493c.png)
四、解答题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34ae8df3776b2c98e44b6293ee06c8b.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a8def34e7a654d7ff3bc7761703f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6129fbf40a950fc8c516f0abaab21957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388596c09d39b4658d5661761055f393.png)
(1)∠B的大小;
(2)△AOC周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2776c3a56a586157a921befeb02ee91f.png)
(1)求C;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036b23c94e305faaa1283996edc5b30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb57d84f9bbcb3e30d4ce7e2e1e8604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f002f960ec07ea229ed243e2d991d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f002f960ec07ea229ed243e2d991d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/072abf560e0f7d5183ded310b686b0e2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25cbe66fe4e84b4022721122baab4a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
【知识点】 利用定义求等差数列通项公式 错位相减法求和
(1)求数列{an}的通项公式;
(2)记bn=log2an+1,求数列{bn}的前n项和Tn.
【知识点】 等差中项的应用 求等差数列前n项和 写出等比数列的通项公式
![](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/e7fab51121848ce166035ceab6f4e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5653b60d16ec4e653518f0562680250.png)
(1)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8411e5165219dc4996de6f02dc4558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4bbf02bb4ae5401e967b3ef391a54d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
(3)设a=4,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7cff4cbddab18fd44da1d26e7c1701d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e778adfe16c6d59f69448895844e15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb74292380b8df9519b9c33bfd564f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23efba32da415735e8363b8bd0a4b998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9f526f2154571a8994fc7d4a930ed8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
【知识点】 写出等比数列的通项公式 求等比数列前n项和 数列不等式恒成立问题