1 . 已知等差数列
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c897ce0bbc7080146baccdb2bfb761.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52b516ac0854c550c164472c9d7de0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5b7bc505b7f648b7aa5f9e7a2da62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c897ce0bbc7080146baccdb2bfb761.png)
您最近一年使用:0次
2020-01-30更新
|
510次组卷
|
2卷引用:上海市静安区2016-2017学年高一下学期期末教学质量调研数学试题
名校
2 . 已知
为等差数列,
为其前
项和,若
,则
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b93ce1c37f1841ccbb1998ed059bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0748c346ed88f98e424de8edf278325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
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3 . 若等差数列
中,
,
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30eb42578f654fb61e826026d2199751.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e29d972ba27bf676989a5abfb51a40.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30eb42578f654fb61e826026d2199751.png)
您最近一年使用:0次
解题方法
4 . 在
中,
分别是角
的对边,且
成等差数列,
,
,
成等比数列,则三角形的形状是________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ace74bfb716753490ebe0e740ff5baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0ae8e92dd3119d41f2c830ea526516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ace74bfb716753490ebe0e740ff5baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e2f2d7147cf1699fbfdef9cf4af74.png)
您最近一年使用:0次
5 . 在等差数列
中,若
等于该数列中的连续五项之和,则这连续五项是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927277551ed0aa177d81668879221970.png)
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6 . 已知一个直角三角形的三边成公差为
的等差数列,那么该直角三角形的斜边长为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
您最近一年使用:0次
7 . 等差数列
中,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84aeb51d3502c2568ae169fb0389c7b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
您最近一年使用:0次
8 . 已知
是等差数列,且
.若
是等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ace74bfb716753490ebe0e740ff5baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa96ecf402318f51b9ed7ccf8dc8eb50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb63edec714b2be8f5767d174383eb19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
您最近一年使用:0次
名校
9 . 已知四个数
依次成等比数列,且公比
不为1.将此数列删去一个数后得到的数列(按原来的顺序)是等差数列,则
的取值集合是_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aaab013c25b014549fd0675c2b34df1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
2019-08-17更新
|
603次组卷
|
5卷引用:江苏省南通市如皋市2018-2019学年高一下学期教学质量调研(二)数学试题
(已下线)江苏省南通市如皋市2018-2019学年高一下学期教学质量调研(二)数学试题2015届江苏高考南通密卷二数学试卷智能测评与辅导[文]-等比数列上海市晋元高级中学2019-2020年高二上学期9月阶段反馈数学试题2017届上海市复旦大学附属中学高三毕业考试数学试题
名校
10 . 设等差数列{an}的前n项和为Sn,若S8=32,则a2+2a5+a6=________ .
您最近一年使用:0次
2019-08-16更新
|
1181次组卷
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3卷引用:智能测评与辅导[文]-等差数列