试题:
(本小题满分16分) 已知数列满足, (1)若数列是等差数列,求的值; (2)当时,求数列的前n项和; (3)若对任意都有成立,求的取值范围. |
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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