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voquynh0310
2 năm trước
Tính 2x+1 chia hết cho 3x+3 -Vì 2x+1 chia hết cho 3x+3 =>3x+3 cũng chia hết cho 3x+3 =>2.(3x+3)-3.(2x+1) =6x+6-6x-2 =>3x+3 thuộc Ư(3) đến chỗ này cho mình hỏi tại sao 3x+3 lại thuộc Ư(3) mà 2x+1 không thuộc Ư(3) ạ Giải Thích: có phải vì dạng này luôn luôn là Mẫu của dạng này luôn luôn thuộc Ư của một số nào đó còn tử của dạng này thì không bao giờ thuộc Ư của một số nào đó mình giải thích đúng không ạ xong mik vote 5 sao cảm ơn nhiều ạ
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