determine if each sequence is an arithmetic sequence.if the sequence is arithmetic ,find the common difference确定每个序列是一个等差数列.如果序列是算术,找到它们的公差1.1,1,2,3,5,8,.2.1,2,4,8,16,.求公差啊( ⊙ o ⊙
问题描述：
determine if each sequence is an arithmetic sequence.if the sequence is arithmetic ,find the common difference
确定每个序列是一个等差数列.如果序列是算术,找到它们的公差
1.1,1,2,3,5,8,.
2.1,2,4,8,16,.
求公差啊( ⊙ o ⊙
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