1 . 已知等差数列
的公差d不为0,若
,
,
成等比数列,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e151e8083936ff799a0f27c54704d9.png)
A.![]() | B.2 | C.![]() | D.4 |
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2022-12-07更新
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459次组卷
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2卷引用:江苏省连云港市2021-2022学年高一上学期期末调研数学试题(4)