试题:
(本小题满分12分)已知数列满足,,且对任意都有 (Ⅰ)求,; (Ⅱ)设,证明:是等差数列; (Ⅲ)设 ,求数列的前n项和. |
等比数列的定义及性质, 等差数列的定义及性质
2016-05-24
答案:
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