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关注：1
2013-05-23 12:21
求翻译：在等差数列{an}中,a1=2,a17=66,求数列{an}的前20项和是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
在等差数列{an}中,a1=2,a17=66,求数列{an}的前20项和
问题补充： |
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2013-05-23 12:21:38
Arithmetic sequence {an}, a1 = 2, a17 = 66, ask the series of {an} 20
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2013-05-23 12:23:18
An arithmetic series in { } in a, 1 = 2, a = 66, and 17 series {An} of the first 20 and
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2013-05-23 12:24:58
In grade sequence {an}, a1=2, a17=66, asks sequence {an} the first 20 items with
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2013-05-23 12:26:38
Arithmetic sequence {an}, A1=2,A17=66, previous 20 items of the sequence {an} and
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2013-05-23 12:28:18
正在翻译，请等待...
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