1 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e660c7351bbf1dbb720399822e2a8b.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edbef0d628c9e92564b2ec5062997f34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e660c7351bbf1dbb720399822e2a8b.png)
您最近一年使用:0次
2 . 已知
且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840d30083a8bdb7a2f4a68586f3aa2d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e660c7351bbf1dbb720399822e2a8b.png)
A.![]() | B.![]() |
C.![]() | D.前三个选项都不对 |
您最近一年使用:0次
3 . 已知数列
满足
,其中
,记
表示数列
的前n项乘积,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ab6b23a2f24efae71c83405a5dfcea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797bbd18359c9a29842b39109b3a0aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
4 . 数列
中,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1416daee5942a312be1c6f1ef2f3e3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次