Mathematics
Undergraduate
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1.2 約数と倍数
5
問題1.3
0でない整数 a,6,cに対して, 次が成り立つことを示せ。
(1) a|bかつ6|a → a=±6。
(2) a|bかつ6|c
→ a|c.
(3) a|b → ac| be.
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