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wushiyulan
2 năm trước
*So Sánh: C= $\frac{2017.2018-1}{2017.2018}$ và D= $\frac{2018.2019-1}{2018.2019}$ Giải giùm mk với ạ! Hứa sẽ vote, tl hay nhất, cảm ơn đầy đủ.
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