5. (3%) Let a,b,k,n be integers. Which of the following statements is not coTect? (A) a ≡b (mod n) ka≡ kb (mod n) (B) a≡b (mod kn) a≡b (mod n) (C) a≡b (mod n) ka≡ kb (mod kn) (D) a≡b (mod n) a≡b (mod kn)
5. (3%) Let a,b,k,n be integers. Which o..-阿摩線上測驗
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ka≡ kb (mod n)
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