He considers himself an expert on the subject,in fact,he is poor on it.怎么译

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• He considers himself an expert on the subject,in fact,he is poor on it.怎么译
• He considers himself an expert on the subject,in fact,he is poor on it.怎么译
• 2^1-1=1 2^2-1=3 2^3-1=7 2^4-1=15 归纳个位数字规律,归纳个计算结果中的个位数字规律2^2006-1的个位数
• 计算：2^1-1=1,2^2-1=3,2^3-1=7,2^4-1=15,2^5-1=31···归纳个计算结果中的个位数字规律2^2008-1的个位数