已知两个等差数列{an}和{bn}的前n项和分别为Sn和Tn,且
=
,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42966744fee401161be5bfaadc31d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0b89433a9fedb791968209a69e1644c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bb1bc4a6611d69df87111c06687cfa.png)
更新时间:2023-03-20 14:30:14
|
相似题推荐
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐1】已知正项数列
中,
,
,
,
,数列
的前n项和为
,则
的值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ab91bd407f2d31e75ccdc0722d27cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3c4372fd35348f5c79c2f07f27cc2a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fddf1ad033756db46a40f2c750f6fbfc.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐2】
的三个内角
的对边分别为
,且
成等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751818c8cb28b86418aa0eb745c302aa.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/713fbbd9cda10d832b8ef5cdb033a427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751818c8cb28b86418aa0eb745c302aa.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐1】等差数列
,
的前
项和分别为
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa1f959646f47d0b32bfa6a3411ae55f.png)
______ .
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d688603a69081e9ccce3281de42ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa1f959646f47d0b32bfa6a3411ae55f.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐2】已知
均为等差数列,其前
项和分别为
,且
,则
=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.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/0f07bf05e7cfde1b10a2b0f4be9c1b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265397c51288caa8df9b42f1f698b5a5.png)
您最近一年使用:0次