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标题: JULY JJ[转自我看机经] [打印本页]

作者: smart    时间: 2003-7-30 01:16     标题: JULY JJ[转自我看机经]

18.(4的9次方)乘以5的17次方的结果是几位数?
19.  x1=3,xn+1=2xn - 1, 求 x20 - x19




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