名校
1 . 已知
为等差数列,
为等比数列,公比为q(q≠1).令A=
.A={1,2},
(1)当
,求数列
的通项公式;
(2)设
,q>0,试比较
与
(n≥3)的大小?并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee217b7825a7393aa2adb0339f6954c9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e62e0fac816004f761126bb4b4b789d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc49fb6f3d806949ad10b7826b0969a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfccafa83afe5ee21eab6ef2b2c8852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cba31e8c939286cafff96e8d715a697.png)
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2019-01-15更新
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2卷引用:江苏省无锡市锡山高级中学实验学校2019届高三12月月考数学试题