已知等差数列
的前
项和为
,向量
,
,
,且
,则用
表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0719844e0261af3b625d9673e5926.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/5e311559b12b8a4ab9adfab542f205fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4036b7cd5f986c6f4dbffa3c1c10ab61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee14c64843c7d16a9a52d16b3df34fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1c01af540bae8be12b6d94ad0cfa00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d1e7c03f57de732263211f5799bdd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0719844e0261af3b625d9673e5926.png)
更新时间:2019-11-08 20:56:30
|
相似题推荐
填空题-单空题
|
较易
(0.85)
解题方法
【推荐1】已知向量
,
,
,若
,则t=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324ae9aabe9b5d2800807da07b3d0268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44251d970e896e82279a3d2d7562fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037d31ba398cccf9770084cfdedaf045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cc983058c19c06a47e18ae30bd2668.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
解题方法
【推荐2】已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d33ee1f52775bf9ba66e0fdf0ecbb35.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5559bd424df6d25a4d04e95d19a28d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d33ee1f52775bf9ba66e0fdf0ecbb35.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
解题方法
【推荐1】已知数列
为等差数列,其前n项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cccb3bc143903b3b166facd9a0b1449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
解题方法
【推荐2】设等差数列
的前n项和为
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa37e5661af68b263a3ed9030d4e9003.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0da5f80b15ed0f6952e9e32d48ff9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8b342e45701057b54207a39c864f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa37e5661af68b263a3ed9030d4e9003.png)
您最近一年使用:0次