Geometric Seqence
回答 (2)
2011-10-18 5:35 pm
✔ 最佳答案
Findsum to infinity of the sequence : 1，－ 1，1，－1，1，－1，............ Sol當 n為奇數Sn=1當 n為偶數Sn=0Solim(n->∞)_Sn 不存在
2011-10-18 7:45 pm
In G.S. 's sum to infinity
|r| < 1, it is a condition.
|r| < 1, it is a condition.
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