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标题: 整除题求救 [打印本页]

作者: Etoile- 时间: 2017-8-29 23:50
标题: 整除题求救
Is  (x  –  1)(x  +  1)  divisible  by  24?
(1) x  is  not  divisible  by  3.
(2) (x  –  1)  is  divisible  by  2.

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