Q4:
For a nonnegative integer n, if the remainder is 1 when 2n is divided by 3, then which of the f ...
cherryser 发表于 2013-3-29 20:42
Q15:
If n is a positive integer and r is the remainder when (n – 1)(n + 1) is divided by 24, what ...
cherryser 发表于 2013-3-29 20:43
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