1 . 有这样一道题目:“戴氏善屠,日益功倍.初日屠五两,今三十日屠讫,向共屠几何?”其意思为:“有一个姓戴的人善于屠肉,每一天屠完的肉是前一天的2倍,第一天屠了5两肉,共屠了30天,问一共屠了多少两肉?"在这个问题中,该屠夫前5天所屠肉的总两数为( )
A.35 | B.75 | C.155 | D.315 |
您最近一年使用:0次
2020-07-19更新
|
877次组卷
|
10卷引用:2020届河北省衡水中学高三模拟(三)数学(理)试题
2020届河北省衡水中学高三模拟(三)数学(理)试题(已下线)专题2.2等比数列及其求和(A卷基础篇)-2020-2021学年高二数学必修五同步单元AB卷(人教A版,浙江专用)(已下线)第13练 等比数列与求和-2021年高考数学一轮复习小题必刷(山东专用)江苏省无锡市第三高级中学2020-2021学年高二上学期10月基础测试数学试题江苏省南通市海安高级中学2020-2021学年高三上学期10月第一次阶段检测数学试题(已下线)专题5.4 数列的应用与数学归纳法(A卷基础篇)-2020-2021学年高二数学选择性必修第三册同步单元AB卷(新教材人教B版)江苏省南通市海安高级中学2020-2021学年高三上学期1月调研数学试题(已下线)6.2 等比数列(精练)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)山西省怀仁市2021-2022学年高二上学期期末数学(文)试题黑龙江省齐齐哈尔市部分地区2022-2023学年高三上学期1月期末考试数学试题
2 . 已知
的三个角A,B,C成等差数列,三条边a,b,c成等差数列,且
,则
的面积的为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.2 | C.![]() | D.3 |
您最近一年使用:0次
3 . 已知正项等比数列
的公比为q,若
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d8af41c72de00058a7ba8a7f858438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec7ac68e76078dfee5f07dae821a4532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.19 | B.45 | C.55 | D.100 |
您最近一年使用:0次
4 . 已知
为等差数列
的前
项和,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/cdd3a25ac2cde3d2c884028f750cfff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2cb4485663835fc40a9cf82f491d5b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
5 . 已知正项数列
的前n项和为
满足:
若
记
表示不超过m的最大整数,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69b0b71fb74694fda67ee126bc9d036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4203177e0501f89f0d65f9a4940145e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446a172f7d2c546f0a269fdbebcc7d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb8beaa4749d51b9b90a4fed019b4f0.png)
A.17 | B.18 | C.19 | D.20 |
您最近一年使用:0次
2020-06-23更新
|
560次组卷
|
3卷引用:2020届河北省衡水市枣强中学高三下学期3月模拟2数学(理)试题
解题方法
6 . 如图,平面四边形
中,点D为动点,
的面积是
面积的3倍,数列
满足
,
,当
时,恒有
,则数列
的前6项和为( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/cc6dae1c-eadf-4227-b70e-2c0bb808514a.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](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/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e598d5b321f1d608861d6c681d23bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/cc6dae1c-eadf-4227-b70e-2c0bb808514a.png?resizew=160)
A.2020 | B.1818 | C.911 | D.912 |
您最近一年使用:0次
7 . 已知数列
满足:
,
.则下列说法正确的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1381f0937c6052ce088e0eaee7df4880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7df5ae3993264f69d6cf3ae02411064.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
8 . 若
为
的各位数字之和,如:
,
,则
;记
,
,
,…,
,
,则
( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ee58b7cf0449b1e437b5b0db3dd5132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee0e161c98bbc04299df0661ab24434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76beb048182bf1257db4301f5659741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b6f64f96fc7031a474bf7d436bdac01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e092d0b6b216c67ad98e558504cb2753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8502b8308c45d8ed61894059a8bffa18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d7b1b5ab3dac402d6dab3ec55bdeba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ba2605236afc5f137664bb4f9938f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b08c58baacec3cd0c0a06e267fa9ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0812e6728f464221cf6adc42c7c778.png)
A.2 | B.8 | C.5 | D.11 |
您最近一年使用:0次
9 . 已知等差数列
的前n项和为
,
,
,则
( )
![](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/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781bafb821f3926666006bee31bbb3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
A.![]() | B.0 |
C.10 | D.20 |
您最近一年使用:0次
解题方法
10 . 已知数列{an}的前n项和为Sn,且满足an
.数列{bn}满足
则数列{bn}的前100项和T100为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3874bba027d553dcd6ee63c651a0bdb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1cb21657a2332f26222b924003e995.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-06-16更新
|
542次组卷
|
6卷引用:2020届河北省石家庄市高三模拟(八)数学(理)试题
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